1 mice status uknf meeting 3rd may 2006 malcolm ellis
TRANSCRIPT
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MICE Status
UKNF Meeting3rd May 2006Malcolm Ellis
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Introduction
Review of a range of MICE activities. Areas touched on are:
Beamline (P. Drumm) Target (C. Booth) Tracker Review:
Mechanical (G. Barber and T. Matsushita) KEK Analysis (H. Sakamoto and A. Fish) QA (P. Kyberd) Cryo (A. Bross) Electronics (A. Bross)
Muon Test Area (Fermilab) 201 MHz cavity at MTA (LBNL) CKOV I (UCL & Mississippi) DAQ (J.S. Graulich) Frascati Test Beam plans (J.S. Graulich)
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BeamlineT Target Sheffield
A Pion Capture ISIS
B Decay Solenoid EID
C Muon Transport Channel
Liverpool
D Diffuser Oxford
E Support Rails Liverpool?
SupportRails
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Beamline Schedule
ISIS Shutdown First indication during Osaka meeting Now confirmed:
Starts: 22nd December 2006 Ends: 31st August 2007
Additional shutdown: Mid Oct-mid November 2006 Probably ditto in 2007
Within schedule – little slack Completion of the hall work:
waiting for feedback of key information Stairs Mezzanine (Hydrogen System & Access)
Platform (support for MICE) Window for Solenoid Commissioning with Cryogenics
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Target
Focus of recent work has been assembly tests at RAL last week.
Review of components
Results of tests
Preliminary follow-up plans
Components: Stator body Ceramic tube Glass readout tube Target shuttle Ceramic bearings Electronics Frame, jack, bellows, gate-valve
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Target Assembly Test 24th-28th April
First time many parts came together: Stator first connected to electronics 20th
Glass readout tube assembled 21st
Target shuttle finished morning of 24th
Some RAL parts and flanges not previously assembled.
Still digesting results of last week! Despite problems, a lot was learned.
Practical details of assembly for first time. Improved design of major components. No proper vacuum tests. No reliability or vibration tests. Review (with ISIS) 16th May. Will repeat assembly in hall. Unlikely to install in ISIS for June – perform thorough off-
line checks for October access.
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Tracker Mechanical
Station Assembly: Receive doublet-layers from FNAL Visual inspection of the doublet-layers for any damage
caused in transit Align the doublet-layers on a vacuum chuck Bundle seven fibres with rubber sleeves (QA) Thread the bundle into a station connector (QA) Put the vacuum chuck on an assembly jig Fix a carbon-fibre station to the assembly jig Glue the doublet-layers to carbon-fibre station Attach doublet-layers connectors to the carbon-fibre
station Cut the fibres Pot the fibres Polish the fibres
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Tracker Installation
Tracker installation procedurepresented at Tracker Review
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KEK Analysis
Light yield is estimated by fitting the peak with gaussian.
Measured light yield is similar to the result of cosmic-ray test.
Station B A C D
3HF Concentration (ppm) 5000 5000 mixture 2500
Gain of cassette Low Low High High
Measured light yield (p.e.) 8.1 10.3 8.7 5.1
Data from Cosmic-ray test 8.5 9.1 8.7 n/a
This peak is caused This peak is caused by ADC saturation.by ADC saturation.
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Comparison between KEK and Cosmic Ray Analyses
KEK beam test was performed in the fall of 2006. Stability of VLPC are checked.
Pedestal peak is within 1 count, Pedestal width is within 1-2%, Gain is stable within 2%, and Noise rate is within 5-8%.
Light yield and efficiency are studied with 3GeV/c pion beam without B-Field.
Station B A C D
3HF Concentration (ppm) 5000 5000 mixture 2500
Gain of cassette Low Low High High
Measured light yield (p.e.) 8.1 10.3 8.7 5.1
Light yield from Cosmic-ray test 8.5 9.1 8.7 n/a
Measured efficiency (%) 98.0 98.8 99.5 96.6
Expected efficiency (%) 99.92 99.99 100 99.97
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Tracker QA
Plane held on vacuum chuck
Scanning system:
Scanning table
LED and collimation and focussing system
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Bundling QA
Bundle fibres up into sevens – do about 10 bundles.
Hold the fibres together with a rubber sleeve (already used to make the prototype)
For these pictures 370nm was used throughout
7 fibres
Place the bundles in a “comb” to hold them together and in place
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Fibre Imaging
Once the station connectors have been cut and polished.
At this stage we measure light output.
We will also make this measurement on the old stations which have been disassembled – this will allow us to validate the UV measurements against the test beam results
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Effect of UV on Fibres
Hitachi U4100 sample compartment
Measure effect of UV irradiation on the fibres.
Using high performance photometer
High precision fibre launcher
Compartment modified to take optical rails and other components
Detectors & integrating sphereAperture
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Tracker Cryo
MICE VLPC Cryo 2 – 1024 Ch VLPC
Cassettes in each system
Two systems per tracker- 4 Total for MICE + 1 Test Stand
Sumitomo GM Cryocooler
Cold-end operating point at approximately 7K
Cassette Gas system Lid Heater and temp
control circuitry Vacuum pump
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Prototype Cryostat
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Cryostat Performance
Typical Cooldown
Cryostat cool down curve
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Time (hours)
Te
mp
era
ture
(K
elv
in)
Upper stage 1 Lower stage 2
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Temperature Control
Two stage Control Heat applied to 2nd
stage of cryo-cooler (7K)
Commercial Oxford temperature controller
Heaters in cassette (1 per module) control to final set point (9K)
System controls to better than 10 mK
Spec – 50 mK However running with
50Hz power (KEK), left cassette heaters were barely on – almost no control from cassette
Thermal link
1 Count=1 mK
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Cryo Status & Plans
The Prototype MICE VLPC cryo-system has been operated successfully for many months both at Fermilab and KEK
All design specs have been met except for a left-right temperature asymmetry
Thermal link design has been modified This will be tested as soon as the Fermilab shutdown is over
(June 06)
Cryo-coolers have been delivered Cryostat parts are on order – expected delivery is
mid-June 06. All systems will be assembled, tested, and
commissioned by the end of the calendar year
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AFEIIt Status
The AFE IIt pre-production boards (15) have been tested to D0 spec
The first boards came up very quickly In about 1 hour No green wires!
TriPt testing is done Yield is about 80% More than enough chips for D0 + MICE + Spares for both
experiments Plus second pass could yield more
Production Order released April 18th About 14 week lead for delivery of all boards
But many will arrive earlier The critical issue for MICE is MICE-specific firmware
development for AFE IIt NOT a Trivial amount of work
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AFEIIt Test Stands
The MICE IIT group has assembled an AFE test stand and will be responsible for testing left hand production boards
Part of Negotiated agreement that led to D0’s donation of AFE IIt boards to MICE
In Addition an AFE IIt test stand has been assembled at RAL
Board maintenance Firmware development
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Muon Test Area Complex
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201 MHZ Cavity at the MTA
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Results from Preliminary Test
Conditioning started in late February 2006 with Flat copper windows (plates) with Ti-N coatings RF diagnostics Good vacuum ~ high 10-9 Torr
Without an external magnetic field, the cavity conditioned very quietly and quickly to reach ~ 16 MV/m
Limited by available RF power. Test plan being developed:
External magnetic fields Achievable gradients vs magnetic field Curved Be windows.
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CKOVI
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Sr90 Source
reflector cone
aerogel
trigger
8” pmt
Sr90
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CKOVI Road Map
Summer ‘06 = 1 @ FNAL1x1x1 modulewhite reflectorMeasure pe yields
ModelRayleigh Scattering
Scattering vs Absorption~ 0
Transmission vs Aperture 3x3 or 4x4
Spring ‘07Aerogel purchaseBegin Assembly
Fall- 06Mechanical fabrication Reflectors/Cones
CKV01 Summer ‘07
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DAQ & Frascati Test Beam
Preparation for the test of PID detector components and potential front end electronics at a test beam at Frascati in the summer.
Stand alone DAQ is being built for this (not reusing UniDAQ system developed for KEK tests).
Work being done at University of Geneva. Stand alone, local DAQ
DAQ Reduced to minimum:Local Start/Stop of Runs (no remote Run Control -> no DAQ framework,
no event building)Write data on local DiskReadout particle per particleNo interrupts
VME-PCI interface: CAEN V2718 only Limited number of FEE modules supported
TDC V1290 QDC V972
Only 2 Event types: Particle Event Calibration Event
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Status (19th April 2006)
Manpower: J.S. Graulich and 1 undergraduate student
Software for V2718: 80% done All fundamentals are done:
Read and Write in A32/D32,D16Read in BLT32, BLT64Basic I/O Register (2 Inputs, 5 Outputs)
Software for V1290: 80% done Only tested with V1190, should be easily transported to
V1290 Not fully commissioned yet
Software for V792: 40% done Work in progress
Software for run control: 25% done Working on User interface
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First Results & TBD
Readout rate of V1190 27 Mbytes/sec in BLT64
-> 5 ms to read the full V1190 buffer memory(Readout of the tracker would require at least 40 Mbytes/sec… already
obtained with BIT3 interface -> we might have to deal with 2 different interface. No impact for BTF)
I need some inputs Define needs for calibration Define needs for online monitoring Define needs for other FEE modules
Tests of QDC FEE options will start in background Organize transport of my PC…
When is the test beam ?