Y. R. Roblin, G2P review, 1/17/2011 2011 HALLA G2P readiness review Yves Roblin, CASA.

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Y. R. Roblin, G2P review, 1/17/ HALLA G2P readiness review Yves Roblin, CASA

Y. R. Roblin, G2P review, 1/17/ Beamline overview bpms harps calorimeter Fast raster

Y. R. Roblin, G2P review, 1/17/ Initial commissioning

Y. R. Roblin, G2P review, 1/17/ Tasks breakdown for beamline comissioning Task Description duration(hours) durationlead Matching at 1C roblin/OOC Initial Delivery to Hall A roblin BPM commissioning musson Silver Calorimeter ahmad Raster Size roblin FZ2 positioning(7 deg, 2.5T, main dump) roblin 7 degrees,5.01T,main dump roblin 90 degrees, 2.5T,local dump (-3.03 degrees) roblin 90 degrees, 5.01 T, local dump ( degrees) roblin check match roblin/OOC check current interlocks for dipole Roblin/OPS

Y. R. Roblin, G2P review, 1/17/ Initial commissioning of line (12/14-12/22) Beam commissioned in straight-thru. Match to line done, beam spots on design. Moller runs were done. All diagnostics checked, problems identified and being corrected CW of a few tens of nA delivered for physics detector checks. Halla beam dump Match into hall A

Y. R. Roblin, G2P review, 1/17/ Beam envelope and rastering Slow raster to produce 2.2x2.2cm pattern Fast raster to produce 3mmx3mm on top of it Unrastered beam about 30 microns round at target Beam about 50 microns round at Compton

Y. R. Roblin, G2P review, 1/17/ Expected Raster Ranges EnergyX slowY slowX fastY fast 1.1 GeV+/- 2.1 kG cm+/- 1.3 kG cm+/ kG cm +/- 0.1 kG cm 2.2 GeV+/- 4.2 kG cm+/- 2.6 kG cm+/ kG cm+/- 0.2 kG cm 3.3 GeV+/- 6.3 kG cm+/- 3.9 kG cm+/ kG cm+/- 0.3 kG cm Raster limits: COILSLOWFAST X16.8 kG cm3.3 kG cm Y16.8 kG cm3.3 kG cm

Y. R. Roblin, G2P review, 1/17/ Chicane commissioning

Y. R. Roblin, G2P review, 1/17/ prerequisites 1.Beam line commissioned in straight-thru 2.BPM offsets (IPM1H05A/IPM1H05B) cross-calibrated with the harps (IHA1H01/IHA1H05A) 3.Rasters commissioned.

Y. R. Roblin, G2P review, 1/17/ Chicane calculations Find setpoints such that elevation is zero at closing of chicane. Incoming angle is compensated by field of target Done via a spreadsheet. Results imported to Optim for full Orbit. Tracked into ELEGANT for multipole estimation Checked with GEANT and full field map of target solenoid Chicane design

Y. R. Roblin, G2P review, 1/17/ PTarget θTarget BRun #Incoming θ Tilting angle Outgoing θ T T T T T T T T T T Overview of physics runs

Y. R. Roblin, G2P review, 1/17/ Beam trajectories FZ1 fixed, FZ2 on vertical moving stand FZ2 FZ1

Y. R. Roblin, G2P review, 1/17/ Magnet setpoints #ETgtθinΘoutB1(kG)I1(A)B2(kG)I2(A) /2.5T /2.5T /2.5T /2.5T /2.5T /2.5T /5.01T /5.01T /5.01T /5.01T

Y. R. Roblin, G2P review, 1/17/ Procedure 1.Load magnet setpoints for quads and dipoles 2.Establish tune beam to 1H01 viewer with zero incoming angle 3.Insert 1H05 viewer and adjust MFZ1H05A dipole to center beam in it. 4.Retract viewer, adjust MFZ1H05B such that bpms IPM1H05A and IPM1H05B both read zero. 5.Go CW and raise current until seen on dump viewer (0.5 microamps) 6.Check that beam is centered vertically on viewer. If not, adjust MFZ1H05B until it is. 7.Go back to tune mode. 8.Slowly increase slow raster and use Spot++ to assess beam size.

Y. R. Roblin, G2P review, 1/17/ Machine protection

Y. R. Roblin, G2P review, 1/17/ Interlock systems Beam current limited to : –2 μamps CW if going to hall A dump –150 nA CW if going to local dump Done via Beam Loss Accounting (BLA) system current limits (hardware limits with comparator on a current cavity)

Y. R. Roblin, G2P review, 1/17/ Interlock Systems (cont) FZ1 and FZ2 dipole magnet fields A comparator with a window of +/- 5 % or better will be set around the FZ1 and FZ2 setpoint. It will be tied to the Fast shutdown system (FSD).

Y. R. Roblin, G2P review, 1/17/ Interlock Systems (cont) Local dump integrity Temperature measurement probes will be installed on the local dump and monitored for abnormal heating. Will be tied to the FSD system to terminate beam if temperature goes above a predetermined threshold.

Y. R. Roblin, G2P review, 1/17/ Interlock Systems (cont) Hall A Septum Beam Loss Monitors (BLM) probes will be placed downstream of the target area to monitor for scraping in the vicinity of the Septum. Will be tied to pull a FSD.

Y. R. Roblin, G2P review, 1/17/ Interlock Systems (cont) Hall A Target magnet The magnet field will be set at the desired value and a FSD will be pulled if it drops during data taking.

Y. R. Roblin, G2P review, 1/17/ Interlock Systems (cont) Hall A dump Standard procedure for this dump. The BLM probes placed on either side (left and right) will be tied to the FSD. Maximum power limit is 400 Watts driven by the need to protect the target windows not the dump..

Y. R. Roblin, G2P review, 1/17/ Extra slides

Y. R. Roblin, G2P review, 1/17/ Position on local dump Actual design will be presented in R. Wines talk. 3.3/90/5.01T 2.2/90/5.01T 1.1/90/5.01T