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FORM # LAT-FS-0012-03

DCN No.

LAT-XR-02143-01

LAT PROJECT DOCUMENT CHANGE NOTICE (DCN) SHEET 1 OF 1

ORIGINATOR: Elliott Bloom PHONE: 650-926-2469 DATE: 5/7/03

CHANGE TITLE: DCN for Engineering Model System Level Test Plan ORG.:

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LAT-TD-01137 Engineering Model System Level Test Plan 01

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ORIGINATOR: Elliott Bloom (signature on file) 8/6/03 ACD- Dave Thompson (signature on file) 8/6/03

ORG. MANAGER: Lowell Klaisner (signature on file) 8/6/03 CAL- Neil Johnson (signature on file) 8/20/03

SE- Dick Horn (signature on file) 8/27/03 Mechanical- Marc Campell (signature on file) 8/25/03

P&SA- Darren Marsh (signature on file) 8/20/03 Electrical- Gunther Haller (signature on file) 8/25/03

Tracker- Robert Johnson (signature on file) 8/6/03 Project Scientist- Steve Ritz (signature on file) 8/24/03

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DCN No: LAT-XR-02143-01

of 19

Hard copies of this document are for REFERENCE ONLY and should not be considered the latest revision beyond the date of printing.

Document # Date LAT-TD-01137-01 08/06/03 Author(s):

E. Bloom

Subsystem/Office GLAST LAT Integration and Test Subsystem

Document Title Engineering Model System Level Test Plan

Gamma-ray Large Area Space Telescope (GLAST)

Large Area Telescope (LAT)

Integration and Test Subsystem

Engineering Model (EM) System Level Test Plan

LAT-TD-01137-01 Engineering Model System Level Test Plan Page 2 of 19


Change History Log Revision Effective Date Description of Changes

-01 08/06/03 Initial Release



Contents 1. PURPOSE.................................................................................................................................. 5

2. SCOPE ....................................................................................................................................... 5

3. ACRONYMS / DEFINITIONS ............................................................................................... 5 3.1. Acronyms.............................................................................................................................................................5 3.2. Definitions............................................................................................................................................................6

4. APPLICABLE DOCUMENTS................................................................................................ 6

5. OVERVIEW.............................................................................................................................. 7

6. REQUIRED COMPONENTS ................................................................................................. 7 6.1. Tracker Subsystem Contribution......................................................................................................................8

6.1.1. Tracker Mechanical EM Module .................................................................................................................8 6.1.2. Tracker Mini Tower EM Module .................................................................................................................8 6.1.3. Tracker MGSE..............................................................................................................................................9 6.1.4. Tracker Test Scripts ......................................................................................................................................9

6.2. Calorimeter Subsystem Contribution ...............................................................................................................9 6.2.1. EM Calorimeter Module...............................................................................................................................9 6.2.2. Mechanical Calorimeter Model .................................................................................................................10 6.2.3. Calorimeter MGSE .....................................................................................................................................10 6.2.4. Calorimeter Test Scripts .............................................................................................................................10

6.3. Electronics Subsystem Contribution...............................................................................................................10 6.3.1. Electronics Hardware..................................................................................................................................10 6.3.2. Mechanical Hardware .................................................................................................................................11 6.3.3. Embedded System Software .......................................................................................................................11

6.4. Mechanical Subsystem Contribution ..............................................................................................................11 6.5. I&T Subsystem Contribution ..........................................................................................................................11

6.5.1. I&T Subsystem Mechanical Ground Support Equipment (MGSE) Contribution.......................................11 6.5.2. I&T Subsystem Online Contribution ..........................................................................................................12 6.5.3. I&T Subsystem SVAC Contribution ..........................................................................................................12

6.6. SAS Subsystem Contribution ..........................................................................................................................13 7. INTEGRATION AND TEST PROCESS ............................................................................. 13

7.1. TKR Prototype Mini-tower at SLAC..............................................................................................................13 7.2. 1x4 grid Full Mechanical EM tower at SLAC................................................................................................14 7.3. Grid Bay Mockup with EM TKR Mini-tower and EM Calorimeter Module at SLAC. ............................14

8. SCHEDULE............................................................................................................................. 15

9. MEETINGS............................................................................................................................. 16



10. APPENDIX: SUPPLEMENTAL FIGURES........................................................................ 17



1. PURPOSE The purpose of the Engineering Model (EM) System Level Test Plan is to define the plans for the integrated Engineering Model.

2. SCOPE This document covers the activities that occur at SLAC using components provided by other subsystems as well as components provided by the Integration and Test Subsystem. This document clarifies the configuration and the test methodologies of each of the two EM test beds (live and mechanical), and hardware/software provisional responsibility/schedule.

The document is divided into sections defining the components required to build and test the Engineering Model and the integration and test process that is planned. The required components are described in Section 6 along with which organization will provide the components. The integration and test process is described in Section 7.

3. ACRONYMS / DEFINITIONS

3.1. ACRONYMS ACD Anticoincidence Detector

ASIC Application Specific Integrated Circuit

CAL Calorimeter

CDE Crystal Detector Element

DAQ Data Acquisition System

EGSE Electrical Ground Support Equipment

EM Engineering Model

EM1 Engineering Model 1

EM2 Engineering Model 2

EMI Electromagnetic Interference

EPU Event Processor Unit

GLAST Gamma-ray Large Area Space Telescope

GLT Global Trigger

GSI A heavy ion research center located in Darmstadt, Germany

GTE Global Trigger Electronics

GUI Graphical User Interface

HPK Hamamatsu Photonics K (Japan)

I&T Integration and Test

LAT Large Area Telescope



MCM Multi Chip Module for Tracker

MGSE Mechanical Ground Support Equipment

PDR Preliminary Design Review

PIN Positive-Intrinsic-Negative, a type of semiconductor

PSA Power Supply Assembly

SSD Silicon Strip Detector

SVAC Science Verification Analysis and Calibration

TEM Tower Electronics Module

TBD To Be Determined

TKR Tracker

3.2. DEFINITIONS 1x1 Grid Mockup of a single grid bay.

1x4 Grid Engineering Model Grid that only contains four bays all in a row .

4. APPLICABLE DOCUMENTS Documents relevant to the Engineering Model System Level Test Plan.

• 433-MAR-0001 Mission Assurance Requirements (MAR) For the Large Area Telescope (LAT)

• LAT-MD-00404 LAT Contamination Control Plan

• LAT-TD-00856 Engineering Model System Integration Work Instructions

• LAT-TD-01164 EM Functional Test Plan

• LAT-TD-01014 I&T Engineering Models Usage Plan

• LAT-MD-00466 LAT I&T SVAC Plan

• LAT-TD-00440 LAT Particle Test Plan

• LAT-MD-00573 LAT – SVAC Plan for the Engineering Model

• LAT-TD-00578 LAT – SVAC Database for the Engineering Model

• LAT-TD-00550 Airplane Test Plan

• LAT-TD-861-01 Test-stand architecture redux (contains EM1 Transition Board Description)

• LAT-TD-00586 Online Subsystem Interface Control Document

• LAT-SS-00570 I&T/SAS Interface Control document for the Engineering Model

• LAT-SS-00138 LAT Tracker Interface Control Specification

• LAT-SS-00176 Tracker-LAT Electrical Interface Control Document

• LAT-SS-00238 Calorimeter-LAT Interface Control Document



• LAT-DS-00916 EM – Live Calorimeter Module

• LAT-DS-01038 1x4 Grid Drawing

• LAT-DS-00233 Interface Definition Drawing, CAL-LAT Mechanical Interface

5. OVERVIEW The system level Engineering Model will consist of an EM 1x1 Grid (supplied by I&T), 1x4 Grid, an EM live Tracker Mini Tower Module, an EM Mechanical Tracker Module, an EM Calorimeter Module, EM Electrical Ground Support Equipment, and Mechanical Ground Support Equipment.

The EM activities will split into two major subactivities. One will focus on functionality test and calibration test development using the TKR live module, CAL EM, EM TEM/TEMPS with the 1x1 Grid. The second on mechanical interface issues using the TKR mechanical module, CAL EM, EM TEM/TEMPS with the 1x4 Grid.

The following list broadly defines the goals of building a integrated Engineering Model.

• Validate functional test and calibration procedures on an integrated system, including CAL,TKR, Electronics, whose design is very close to the final flight configuration.

a. Test MGSE alignment/handling/assembly tools and procedures of integrated LAT system.

b. Test EGSE hardware/procedures/scripts for functional tests of integrated LAT system. Check data integrity.

c. Prototype the majority of LAT functional tests.

d. Test CAL-TKR DAQ synchronization with cosmic rays.

• Use of Van de Graaff accelerator hardware and EGSE software that may be eventually used to tune the LAT MC for LAT 20 MeV photon effective area and energy resolution Science Requirements (using 17.6 MeV photons). Detailed comparisons with EM Tower Monte Carlo from the Van de Graaff measurements will not be a data product of the I&T EM program.

• Prototype the calibration infrastructure of the integrated LAT system.

• develop prototype infrastructure for the reconstruction software that will eventually be used to establish the LAT 20 MeV photon effective area and resolution Science Requirements (using 17.6 MeV photons).

• Test Mini-Tower to check for sensitivity to microphonics by stimulating the module with acoustic frequencies appropriate to expected airplane levels. TBR

6. REQUIRED COMPONENTS This section describes the required components and is organized by the subsystem that will contribute the items.



6.1. TRACKER SUBSYSTEM CONTRIBUTION The Tracker Subsystem will provide one full size, fully mechanically correct, mechanical module, and a Mini-tower Module consisting of 4 trays loaded with 3 x-y planes of functional detectors and electronics and 3 planes of tungsten foils each of 3% radiation length (They will also provide a mechanically identical prototype TKR EM minitower a few months earlier than the final TKR EM minitower). The mini tower will have the flight mechanical grid interface. The mini-tower will have flight electronics and cables, and flight SSDs. The tracker subsystem will also provide a TKR lift fixture for the mechanical module, and preliminary functional test scripts.

For comparison to the EM models provided by TKR, a description of the current design of a flight tracker tower follows:

• 19 stiff composite “tray” panels support

– SSDs on both faces with electronics on two sides.

– Converters are on the bottom face, just above the SSD plane.

– 2-mm gap between trays.

• 16 layers of tungsten converter foils.

– 12 layers of 3% X0 converters, followed by four 18% X0 layers.

• 18 x and 18 y SSD planes.

• Titanium reinforced bottom interface tray.

• Carbon-fiber sidewalls to conduct heat to the base and stiffen the module.

• Electronics are based on 2 ASICs, PC boards, and custom flex cables.

• 31.6 kg mass per module.

• 10.5 W of power per module.

6.1.1. Tracker Mechanical EM Module The Tracker Mechanical EM Module is defined by drawing LAT-XX-XXXXX (TBD), see Figure 1.

• Full-scale mechanical-thermal tower:

– 19 Trays, sidewalls, flexures, etc. to the flight design, including Ti reinforced interface tray.

– Dummy Si detectors (including some HPK SSD rejects).

– Dummy MCMs loaded with resistors to dissipate the expected electronics power load.

• 31.6 kg mass per module.

• 10.5 W of power per module.

6.1.2. Tracker Mini Tower EM Module The Tracker Mini Tower EM Module is defined by drawing LAT-XX-XXXXX (TBD), see Figure 2 and Figure 3.

• Functional mini-tower:



– 4 trays loaded with 3 x-y planes of functional detectors and electronics and 3 planes of tungsten foil. There will be no active SSD on the top of the 1st tray, and the bottom of the 4th tray. The placement of the tungsten foils will be on the bottom of the first three trays.

– 1 bottom dummy tray with electronics, but without detectors, for a “Grid” interface of flight design.

– Aluminum sidewalls.

– Flight like readout cables (same quality and readout configuration as flight).

– Approx. 6 kg mass.

6.1.3. Tracker MGSE The Tracker subsystem will provide a tracker lift fixture for lifting the mechanical EM. Tracker supplied MGSE is defined by drawing LAT-DS-00873. Since it is light in weight (~ 6 kg), the Mini Tower will be installed into the 1x1 Grid by hand.

6.1.4. Tracker Test Scripts The tracker subsystem will provide the necessary test scripts for standalone functional testing and operation.

6.2. CALORIMETER SUBSYSTEM CONTRIBUTION The Calorimeter Subsystem will provide a fully instrumented EM Flight design Calorimeter module, along with EM Calorimeter MGSE, and preliminary functional test scripts.

6.2.1. EM Calorimeter Module The EM Calorimeter module will be designed and fabricated to be as accurate a representation of the flight CAL module as possible. It will be of full flight form, fit and function. It will contain flight quality parts where available. The ASICs will be GCFE Version 7 and GCRC Version 4.

There are several known deviations from the flight modules. The PIN photodiodes must be modified for flight, their size must be reduced by 1mm in two-dimensions, certain electrical connections will be moved, and the diode optical window epoxy likely will be changed to silicon glue. The EM CDEs will be manufactured in USA (possibility of as many as 16 from France). Carbon composite structure will use an improved curing process for flight. There have been new discussions on major design changes to the CAL baseplate that should not affect the results of the I&T EM program.

The EM Calorimeter is defined by drawing LAT-DS-00916.

The Calorimeter EM consists of :

• 8 layers of 12 CsI(Tl) Crystals.

– Crystal dimensions: 27 mm x 20 mm x 326 mm.

– Hodoscopic stacking - alternating orthogonal layers.

Dual PIN photodiode on each end of crystals.

• Mechanical packaging – Carbon fiber.

- Composite cell structure.



- Electronics boards attached to each side.

- Electronic readout to connectors at base of calorimeter.

Outer wall is EMI shield and provides structural stiffness as well.

6.2.2. Mechanical Calorimeter Model The mechanical EM model of the Calorimeter is one in the same with the live Calorimeter EM. The CAL subsystem will deliver a full EM model to I&T on the date indicated in Section 8.

6.2.3. Calorimeter MGSE The Calorimeter Subsystem will provide a Calorimeter Lift Fixture that will be used to move the EM Calorimeter from its shipping container to SLAC provided EM-CAL Rotation/Support Stand. The CAL MGSE is defined by drawing LAT-XX-XXXXX (TBD) see Figure 4.

• Calorimeter Shipping Container

• Calorimeter Handling Fixture

• Calorimeter Handling Fixture Support Rods

6.2.4. Calorimeter Test Scripts The Calorimeter Subsystem will provide the necessary test scripts for standalone functional testing and operation.

6.3. ELECTRONICS SUBSYSTEM CONTRIBUTION The EGSE for the Integrated Engineering Model will be the EM1 version of the EGSE defined below.

6.3.1. Electronics Hardware Electronics hardware for the EM1 EGSE is supplied by the Electronics Subsystem. The following components have been agreed to be delivered by ELX:

– EGSE VME crate

– MVME2306 Single Board Computer

– Transition board including Global Trigger.

– LAT COMM boards or LAT Communications Board (LCB)

•Choice depends on maturity of LCB

– 2 Tower Electronics Modules (TEM) v2

• Connectors loaded to support full EM test (CAL, TKR).

• Connectors loaded to support TKR EM test

– 2 EM TEMPS (1 TEMPS will ship with the CAL EM)

– Power Supply Assembly (PSA)

– 28 V Spacecraft “Battery”



– Cables and connectors to interconnect the above except for the TKR to TEM and CAL to TEM cables that are supplied by the TKR and CAL subsystems respectively.

6.3.2. Mechanical Hardware The Electronics Subsystem will be supplying an aluminum Tower Electronics Module (TEM) Box and an aluminum Power Supply Box (PSA).

6.3.3. Embedded System Software Electronics will supply the following embedded system software:

• Hardware drivers (Gives access to hardware registers)

• Command Server (Turns commands into driver subroutine calls)

• Event Data Server (Sends event data downstream)

• Monitoring Data (housekeeping) Server

A Command Server, Event Data Server, and the Monitoring Data Server will be provided by I&T online if the FSW does not have these items ready.

6.4. MECHANICAL SUBSYSTEM CONTRIBUTION The Mechanical Subsystem will provide a 1 x 4 Grid. The 1x4 Grid is defined by LAT drawing LAT-DS-01038. Only one bay out of the four bays in the 1x4 Grid will be used to mount the EM Tracker Mechanical Module and the EM Calorimeter Module. The grid will include all fasteners for TKR –CAL interfaces, and other fasteners associated with the proper use of the grid.

6.5. I&T SUBSYSTEM CONTRIBUTION

6.5.1. I&T Subsystem Mechanical Ground Support Equipment (MGSE) Contribution The I&T Subsystem will provide the mechanical ground support equipment necessary to integrate, handle and support the EM model.

The following items will come from the MGSE department within the I&T Subsystem.

• Calorimeter Alignment Tool

• Calorimeter Alignment Rods

• Calorimeter lift fixture

• Grid bay model (1x1 grid)

• 1x1 Grid lift fixture

• 1x4 Grid lift fixture

• EM Calorimeter Rotation/Support Stand

• Van de Graaff Support Stand

• Shipping Container for the integrated Single Bay.

• Van de Graaff accelerator



• Scintillators and supports to generate external cosmic ray trigger

The Particle Test Department within the I&T Subsystem will provide the scintillators and the Van de Graaff accelerator as defined in LAT-TD-00440 “LAT Particle Test Plan”.

Some MGSE will be provided by CAL, TKR as described in 6.1 and 6.2.

6.5.2. I&T Subsystem Online Contribution The Online contribution to the EM1 EGSE consists of the following:

6.5.2.1. Workstation The Online department within the I&T Subsystem will provide the workstation and the workstation software. The software will have the following functionality.

• Command Client (Gives scripts, etc. access to embedded system)

• Event Client (Receives event data)

• Message logging (Informational, alerts, etc.)

• Event data logging

• Run Control and GUI

• Command/Monitoring GUI

• Electronic Log book

• Core scripts

• Subsystem scripts

• System scripts

6.5.2.2. Visualizations The EM1 EGSE will contain HippoDraw visualization software version 1.1, and version 1.0 of the one event displays written in Qt. The visualization software is provided by the Online department within the I&T Subsystem.

6.5.2.3. Aux Trigger Plans The Transition board supplied by ELX, which contains Global Trigger (GLT) functionality, has an external trigger input. There will be at least one external trigger. This will be used during EM testing at SLAC and consists of an external coincidence between the TKR 3-in-a-row level 1 trigger, and an external scintillator (array supplied by I&T).

6.5.3. I&T Subsystem SVAC Contribution The SVAC department within the Integration and Test Subsystem will provide support as defined in LAT-MD-00466, “LAT I&T SVAC Plan”. The detailed SVAC EM plan is contained in LAT-MD-00573, “LAT – SVAC Plan for the Engineering Model” and LAT-TD-00578, “LAT – SVAC Database for the Engineering Model”.



6.6. SAS SUBSYSTEM CONTRIBUTION The Science Analysis Subsystem has agreed to deliver the following products as described in LAT-SS-00570, “I&T/SAS Interface Control document for the Engineering Model”.

• MC Simulation GLEAM v3

• Prototype Calibration algorithm code and documentation

• prototype infrastructure to input calibration data into reconstruction code

• Reconstructed EM data files

• Data analysis will be supported using IDL and ROOT.

7. INTEGRATION AND TEST PROCESS This section defines the Integration and Test Process. It is broken into four major sections that are in chronological order. The sections are: Grid Bay Mockup with EM Tracker Mini-tower at SLAC, 1x4 Grid Full Mechanical EM tower at SLAC, Grid Bay Mockup with EM Mini Tower and Live EM Calorimeter at SLAC..

7.1. TKR PROTOTYPE MINI-TOWER AT SLAC. MGSE will be used to support the Tracker Prototype EM Mini Tower. The current schedule has the Mini-tower arriving at SLAC 3-4 months before the live EM Calorimeter Module. I&T and the Tracker Subsystem will use this time to focus on the TKR mini-tower. The sequence of planned events is listed below.

• Install prototype Mini-Tower into simple MGSE setup by hand.

• Test with EM Version 2 TEM

• Functional TKR tests - The basic strategy for functional test of the tracker tower is as follows.

o Perform basic tests of tracker related TEM registers and read back tracker environmental quantities.

o Reduce the thresholds and strobe each electronics channel to check for dead channels.

o Set nominal thresholds and perform charge injection scans for each channel. The derived electron noise at amplifier input and gain will be used to determine if individual electronics channels are in non-conformance with pre-defined limits. See LAT I&T EM Functional Test Plan (LAT-TD-01164-01).

• Cosmic Ray Testing - The integrated Engineering Model will be subjected to Cosmic rays per LAT-TD-00440 “LAT Beam Test Plan”. This data will be used to test prototype Cosmic ray test software and calibration.

• Van de Graaff Testing - The integrated Engineering Model will be subjected to the Van de Graaff 17.6 MeV photon beam per LAT-TD-00440 “LAT Particle Test Plan”. As most of the photons from the Van de Graaff that enter the front of the LAT will deposit essentially all of their energy in the Tracker, we will be able to make considerable progress on developing and verifying calibration software using the TKR mini-tower alone. Detailed comparison with Monte Carlo will not be a data product of this test.



7.2. 1X4 GRID FULL MECHANICAL EM TOWER AT SLAC The 1x4 EM Grid provided by the Mechanical Subsystem will be used to test the mechanical installation processes and procedures of the Tracker EM Mechanical Module along with the EM Mechanical Calorimeter Module. The sequence of events is listed below.

• Install EM Mechanical Tracker into 1x4 grid. - The integration process will be performed as defined by the LAT-TD-00856 “Engineering Model Systems Integration Work Instruction”.

• Install EM Mechanical CAL in to 1x4 grid - The integration process will be performed as defined by the LAT-TD-00856 “Engineering Model Systems Integration Work Instruction”.

7.3. GRID BAY MOCKUP WITH EM TKR MINI-TOWER AND EM CALORIMETER MODULE AT SLAC.

The TKR EM mini-tower and the EM Calorimeter module will be installed in the 1x1 grid bay mockup and the integrated EM will be tested as a system. The sequence of events is listed below.

• Install Tracker Mini-Tower and EM CAL into 1x1 grid - The integration process will be performed as defined by the LAT-TD-00856 “Engineering Model Systems Integration Work Instruction”.

• Calorimeter Functional Tests - The basic strategy for functional test of the calorimeter module is as follows. First we perform basic tests of calorimeter related TEM registers and read back calorimeter environmental quantities. Then we lower the thresholds and strobe each electronics channel to check for dead channels. Then we set nominal pedestals/gains and perform charge injection scans for each channel. The derived pedestals and gains will be used to determine if individual electronics channels are in conformance with pre-defined limits. See LAT I&T EM Functional Test Plan (LAT-TD-01164-01).

• Functional tests - "The integrated Engineering Model will be subjected to a series of functional tests per LAT-TD-01164, “LAT I&T EM Functional Test Plan ”. The tests will include; Command Test Sequence, Calorimeter Telemetry Test Sequence, Tracker Telemetry Test Sequence, Systems Integration Test Sequence. The basic strategy for functional test of the integrated tracker-calorimeter-TEM system is as follows. First we perform tracker and calorimeter functional tests, described above. Then we trigger on cosmic ray muons using the calorimeter to check the relative efficiency of the 3-in-a-row trigger. Then we trigger on cosmic ray muons using the tracker, perform online muon reconstruction, and check for synchronization and integrity of the calorimeter data. Finally, a muon scan will be performed on each crystal. The derived crystal response and attenuation will be used to determine if individual crystals are in conformance within pre-defined limits. The deadtime of the system will also be measured.

• Cosmic Ray Testing - The integrated Engineering Model will be subjected to Cosmic rays per LAT-TD-00440 “LAT Particle Test Plan”.

• Van de Graaff Testing - The integrated Engineering Model will be subjected to the Van de Graaff 17.6 MeV photon beam per LAT-TD-00440 “LAT Particle Test Plan”. As most of the photons from the Van de Graaff that enter the front of the LAT will deposit essentially all of their energy in the tracker, considerable progress may have been made on developing and verifying calibration software using the TKR prototype mini-tower by the time the TKR EM mini-tower and EM Calorimeter module have been installed into the grid bay mockup at



SLAC. I&T will use the full EM tower to further validate the calibration software. We will also inject 17.6 MeV photons into the side of the EM Calorimeter module to validate other calibration software to be used on the LAT. The VDG will initially be used to generate photons impinging from the top of the tracker. According to I&T simulations many of these low energy photons (irrespective of the spectrum shape) should reach the calorimeter after triggering via the standard 3-in-a-row TKR trigger. The goal of this test is to show that the calorimeter measures their energy and that the TKR self-triggers photons at the low end of our acceptance. To make a valid measurement of this photon distribution it is necessary to reject the cosmic ray background. We will accomplish this via VDG off running that yields CRs only. We are then able to subtract the CR events accumulated with the VDG photons during the VDG running by recording the time periods of the two types of data accumulation and normalizing appropriately. We will also use data cuts that discriminate photons from CRs. We will also lower the CAL thresholds to 4 MeV/crystal and direct the photons directly in the CAL from the side (CAL only triggers will thus be exercised). The CAL should trigger and we should be able to see a spectrum from these photons. Detailed comparison with Monte Carlo will not be a data product of these tests.

• Test Mini-Tower to check for sensitivity to microphonics by stimulating the module with acoustic frequencies appropriate to expected airplane levels

8. SCHEDULE May 1 is Time =0T: - Required EGSE and MGSE is in place in the Clean room. The VDG accelerator is in place outside of the clean room with its vacuum beam pipe protruding into the clean room. The scintillator muon telescope is in place and operational in the clean room. The TKR minitower is on the MGSE supports. 1 week – Prototype TKR minitower is connected to EGSE and functionally tested 1 week – Prototype TKR minitower cosmic rays for calibration 1 week – Prototype TKR minitower Van de Graaff to collect >= 4000 photons. Prototype TKR shipped back to Italy. Aug 8 The CAL EM arrives and is placed in the clean room and post ship tests are performed while in shipping container . Aug 22 TKR minitower returned to I&T control. The minitower is post ship tested and then the minitower is reinstalled into the single grid bay MGSE, connected to the EGSE and functionally tested. Aug 23 –Sept 18 CAL EM module is installed into the single bay and single bay electrical performance tests are performed. At this point the tower is working as a system. Sept 18 – Oct 14 Cosmic Ray data taking, Van de Graff Data taking and Flight Software Development. Oct 17 – CAL Module on dock at NRL.



TBD Receive 1x4 grid, Receive TKR Mechanical Model, CAL module and perform mechanical fit check.

9. MEETINGS • Start on Thursday August 7 in Bld 33. This is the morning after the CAL EM arrived at

SLAC.

• There will be an 8 AM meeting every weekday. It will last 15-20 minutes.

– Required attendance

• I&T Department managers or knowledgeable representatives.

• Personnel who are on day shift that day.

• A representative from ELX

– Meeting Agenda

• Review of progress of previous day.

• Plan of work for the day shift.

• Reports of Non Conformance or other anomalies from the previous day.

• Brief technical reports having to do with work done the past day or two.

• There will be a 4PM meeting if we have scheduled a swing shift. It will last 10-15 minutes.

– Required attendance

• I&T Department managers or knowledgeable representatives.

• Personnel who were on day shift and who will be on swing shift that day.

• A representative from ELX.

– Meeting agenda

• Review of progress of day shift.

• Plan of work for swing shift.

• Reports of Non Conformance or other anomalies from day shift.



10. APPENDIX: SUPPLEMENTAL FIGURES This section contain supplemental figures of items that do not currently have drawing numbers but have conceptual CAD models.

Figure 1: Tracker Mechanical EM Tower



Figure 2: Tracker Mini EM Tower (Bottom View)

Figure 3: Tracker Mini EM Tower (Exploded View)



Figure 4: Calorimeter lift fixture, with Alignment tool and Mockup Cal