g2p/GEp Beamline

Tim MichalskiProject Lead

Overview• Facilitate the design, procurement, and

build of the beamline – up to the target chamber

• g2p/GEp Beamline Overview• Experimental Plan• Project Overview• Project Status• Project Challenges with Risk Mitigation• Project Schedule and Milestones

Beamline Overview

A second configuration will have the target at the pivot and a longer articulating arm.

Experimental PlanRun #

Bam Energy

Beam Current

Target Angle Target Location Septa Magnet Dump

Target Material Target field Comments

1 2.257 1 uA 20 87 cm upstream N/A N/A Hall A Dump N/A 0.0 Straight Thru Beam at nominal height.2 2.257 50-130 nA 90 87 cm upstream g2p Yes - 6 deg Local Dump NH3 5.1 T3 2.257 150 nA max 90 87 cm upstream g2p Yes - 6 deg Local DumpCarbon(?) 5.1 T Thru Target(?) - Optics4 2.257 50-130 nA 20 87 cm upstream GEp Yes - 6 deg Local Dump NH3 5.1 T5 1.159 1 uA 20 87 cm upstream N/A N/A Hall A Dump N/A 0.0 Straight Thru Beam at nominal height.6 1.159 50-130 nA 20 87 cm upstream GEp Yes - 6 deg Local Dump NH3 2.5 T7 1.159 50-130 nA 90 87 cm upstream g2p Yes - 6 deg Local Dump NH3 2.5 T8 1.159 150 nA max 90 87 cm upstream g2p Yes - 6 deg Local Dump Carbon(?) 2.5 T Thru Target(?) - Optics9 1.706 1 uA 20 87 cm upstream N/A N/A Hall A Dump N/A 0.0 Straight Thru Beam at nominal height.

10 1.706 50-130 nA 90 87 cm upstream g2p Yes - 6 deg Local Dump NH3 2.5 T11 1.706 150 nA max 90 87 cm upstream g2p Yes - 6 deg Local Dump Carbon(?) 2.5 T Thru Target(?) - Optics12 1.706 50-130 nA 20 87 cm upstream GEp Yes - 6 deg Local Dump NH3 2.5 T27 2.257 50-130 nA 20 87 cm upstream G2p Yes- 6 deg Local Dump NH3 5.1T Target nominal height28 2.257 50-130 nA 90 87 cm upstream g2p Yes - 6 deg Local Dump NH3 5.1 T Target nominal height13 3.355 1 uA N/A 87 cm upstream N/A N/A Hall A Dump N/A 0.0 Straight Thru Beam at nominal height17 3.355 50-130 nA 0 87 cm upstream g2p Yes - 6 deg Hall A Dump NH3 5.1 T Longitudinal target polarization run15 3.355 50-130 nA 90 87 cm upstream g2p Yes - 6 deg Local Dump NH3 5.1 T16 3.355 150 nA max 90 87 cm upstream g2p Yes - 6 deg Local Dump Carbon(?) 5.1 T Thru Target(?) - Optics18 2.257 1 uA N/A At pivot N/A N/A Hall A Dump N/A 0.0 Straight Thru Beam at nominal height.19 2.257 50-130 nA 90 At pivot g2p No - 12.5 deg Local Dump NH3 5.1 T20 2.257 150 nA max 90 At pivot g2p No - 12.5 deg Local Dump Carbon(?) 5.1 T Thru Target(?) - Optics21 2.257 50-130 nA 90 At pivot GEp No - 12.5 deg Local Dump NH3 5.1 T26 1.159*** 50-130 nA 90 At pivot No – 12.5 deg Local Dump N/A 2.5 T Optics Transform22 3.355 1 uA N/A At pivot N/A N/A Hall A Dump N/A 0.0 Straight Thru Beam at nominal height.23 3.355 50-130 nA 90 At pivot g2p No - 12.5 deg Local Dump NH3 5.1 T24 3.355 150 nA max 90 At pivot g2p No - 12.5 deg Local Dump Carbon(?) 5.1 T Thru Target(?) - Optics25 3.355 50-130 nA 90 At pivot GEp No - 12.5 deg Local Dump NH3 5.1 T

*** - FZ1 and FZ2 in position for 2.2 GeV run, but with half field strength on FZs and Target magnets

Targ

et E

leva

ted

by 9

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Rev 3

Run Trajectories

FZ1

FZ2

Target

FZ1

FZ2

Target

Region 1

Slow Raster/Calorimeter Stand

Regions 2 and 3

Upside Down Girder – Region 2

FZ1 Magnet Stand – Region 3

Viewer – Region 3

Beam Diagnostics Girder “Articulating Arm” – Region 3

Project Overview• Design, procurement, component calibration

and testing– Now through May, 2011– Some components arrive after May

• Access to Hall A for installation – May 16, 2011

• Installation completion – start of Physics– November 19, 2011

Project Status• Regions 1 and 2 designs complete and material

ordered• Region 3 design complete – procurement under

way• Calorimeter controller repaired and SW upgrades

complete• I&C electronics designed and being built• New Transport electronics being built for existing

BPMs in Hall A• Safety systems for experiment reviewed• Resource planning integrated into 6MSD

schedule

Project Challenges• BPMs and BCMs for Low Current data

– Mitigation• BPM – short M15 style, new electronics, tested in

North LINAC• BCM – new receiver, tested in Hall A

• FZ Magnet PS requirements evolving– Need up to 4 kG, requiring 231A for FZ1– Need up to 8 kG, requiring 465A for FZ2– Mitigation – assessed capabilities of magnet

power supplies in Hall C – meet requirements – assembling spares

Project Challenges• Acquisition of equipment from various

sources– FZ magnets, corrector magnets, slow raster,

new BPMs, power supplies, controllers– Mitigation – get control as soon as possible,

test and calibrate early (before installation)• Resurrection of Tungsten Calorimeter

– Reposition in beamline, re-establish functionality, recalibrate

– Mitigation – Controller extracted from Hall A, repaired, SW complete

Project Challenges• Slow Raster control issues in previous

experiment– Mitigation – New function generator – Testing

in Progress by Physics Fast Electronics Group

• Installation at the same time as 12 GeV upgrades during 6 month down– Mitigation – tied to detailed 6MSD planning –

all resources identified in schedules – have ~3 weeks float

Project Challenges• Not all material for installation on site yet

– Mitigation – FZ2 Stand procurement being managed –

potential impact to 6MSD installation reviewed– Viewer and Articulating Arm Girder /

Positioning – manage through Machine Shop and local vendors

Safety – PSS / FSD• Uses standard BLA system components• Monitoring FZ magnet PS current – limits set to ensure

beam is controlled successfully through the chicane• FSD masking for Calorimeter Operation• Viewer in chicane – allows MCC Operators to view beam

for steering confirmation• Thermocouples on LC dump• Viewer on LC dump – allows MCC Operators to view

beam for steering confirmation• Update PSS sweep procedure as required after walk-

through, equipment installation• “Lock Out” FZ2 stand control – remove controller

Beamline Installation Schedule

Beamline Installation Milestones