Difference between revisions of "Start up run plan"
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| − | + | * Most recent RC status update: [http://www.jlab.org/~adaq/halog/html/1009_archive/100927111641.html HALOG 332914] [Monday 09-27-2010 11:15am] | |
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| − | + | ==Beam no LHRS, no solid target, no cryo target== | |
| − | + | We will start with a 5 passes beam. | |
| − | Goal: optimize beam quality to limit noise in calorimeter<br> | + | The tasks below appear roughly in order of priority, one assumes that we have solid targets in place. |
| + | |||
| + | ===Getting beam threaded down to the dump for the first time=== | ||
| + | ===Beam quality optimization study === | ||
| + | Goal: optimize beam quality to limit noise in calorimeter, once shoot for something like 100 Hz in the detector per uA of beam.<br> | ||
Need: working Compton photon detector with appropriate HV and threshold settings, working Compton DAQ that can provide scaler data to the appropriate EPICS channel<br> | Need: working Compton photon detector with appropriate HV and threshold settings, working Compton DAQ that can provide scaler data to the appropriate EPICS channel<br> | ||
| − | Contact: Eric Fuchey for Compton, | + | Contact: Eric Fuchey for Compton, '''Yves Roblin''' (MCC) support for beam manipulation (Note: Jay is focused on Qweak optics) |
| − | + | ||
| − | + | ===BPM calibration=== | |
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
Goal: check response of the BPMs to know motion of the beam<br> | Goal: check response of the BPMs to know motion of the beam<br> | ||
Need: Harps working, BPMs reading at least through EPICS, 5uA beam<br> | Need: Harps working, BPMs reading at least through EPICS, 5uA beam<br> | ||
| − | Method: For each of the following approximative beam position, record beam position with the BPMS and with the harps. Beam position : (0,0), (0,2), (0,-2), (2,0), (-2,0) | + | Method: For each of the following approximative beam position, record beam position with the BPMS and with the harps. Beam position : (0,0), (0,2), (0,-2), (2,0), (-2,0)<br> |
Contact: J. Roche. | Contact: J. Roche. | ||
| − | * Raster size calibration | + | |
| + | ===BCM calibration=== | ||
| + | Goal: calibrate BCM readings between 0 and 20 uA, with special care to readings between 2 and 7 uA<br> | ||
| + | Need: BCMs reading in a coda file, any DAQ setting will do<br> | ||
| + | Method: MCC procedure (MCC-PR-04-008) [[http://www.jlab.org/~jroche/transfer/HallA_BCM_linearity.pdf]]<br> | ||
| + | BCM log file is documented in d2m wiki [[https://hallaweb.jlab.org/wiki/index.php/BCM_calibration_%28d2n%29]]<br> | ||
| + | Key for BcmLog files<br> | ||
| + | Column headings for BCM log file (from Vince via Kalyan):<br> | ||
| + | * Entry #<br> | ||
| + | * BCM 1 voltage (upstream BCM)<br> | ||
| + | * BCM 2 voltage (downstream BCM)<br> | ||
| + | * Unser (not used)<br> | ||
| + | * Faraday Cup (if extracted = 0)<br> | ||
| + | * 0L02 (injector reading)<br> | ||
| + | * 0R07 (not used) <br> | ||
| + | |||
| + | Contact: J. Roche | ||
| + | |||
| + | ===Raster size calibration=== | ||
Goal: to check the raster size against effective readout.<br> | Goal: to check the raster size against effective readout.<br> | ||
| − | Need: BPM calibration, 5uA, BPM readings in a coda file (Need to define DAQ setting)<br> | + | Need: BPM calibration, 5uA, BPM readings in a coda file to be able to run spot++ (Need to define DAQ setting : T8 ??)<br> |
| − | Method: vary the size of the raster. | + | Method: vary the size of the raster, take one run for each of the following MCC unit raster size (3*2), (7*5), (10*8), produce spot++ image at each setting. Those settings are taken off that page [[https://hallaweb.jlab.org/wiki/index.php/Beam_Recovery_Procedure]]<br> |
| + | Contact: J. Roche | ||
| + | |||
| + | ===Energy measurement=== | ||
| + | Goal: to know the beam energy to 10<SUP>-4</SUP><br> | ||
| + | Need:the ninth dipole to work<br> | ||
| + | Method:MCC procedure MCC-PR-04-006 [[http://www.jlab.org/~jroche/transfer/HallA_energy_measurement.pdf]]<br> | ||
| + | Contact: A. Saha<br> | ||
| + | |||
| + | === Compton work??=== | ||
| + | Not sure what to put here... Can we do things with the 5-pass beam?<br> | ||
| + | Contact: C. Hyde?? | ||
| + | === Cavity monitors checkout=== | ||
| + | Again not sure what goes there... | ||
| + | |||
| + | * '''John Musson''', Bob Michaels, Zafar Ahmed (PREx) know the system | ||
| + | |||
| + | * at minimum, we need to make sure that the amplifier settings are such that the the system can safely take beam | ||
| + | |||
| + | ==Beam with no LHRS, no cryo target but solid target== | ||
| + | |||
| + | ===Luminosity detector check out=== | ||
| + | Goal: check that the lumi detector scaler readings make sense eg: rates versus beam current<br> | ||
| + | Need: carbon target and beam varying between 0 and 20 uA<br> | ||
| + | Method: take short runs with various beam intensity<br> | ||
| + | Contact: K. Allada<br> | ||
| + | |||
| + | ===Center beam on target=== | ||
| + | Goal: get the beam to hit the center of the holed carbon foil<br> | ||
| + | Need: BPMs reading at least through EPICS, single rates in the calo??<br> | ||
| + | Method:Insert Beo target, shoot 5uA and center un-rastered beam on the center of the Beo target. Insert holed Carbon target, turn on ratser, take a run with single in the calo ??<br> | ||
| + | Contact: C. Munoz Camacho<br> | ||
| + | |||
| + | === Establish maximum luminosity sustainable by calo=== | ||
| + | Goal: to define luminosity at which we are getting too many pile-up in the ARS (not ideal on the carbon target... <br> | ||
| + | Method: ??<br> | ||
| + | Contact: C. Munoz Camacho | ||
| + | |||
| + | === Elastic counts in the Calorimeter === | ||
| + | Goal: exercise our reading of the calo<br> | ||
| + | Need: solid Carbon target, ARS readout, to define the calo angle, distance to target<br> | ||
| + | Method: ?? | ||
| + | Contact: C. Munoz Camacho<br> | ||
| + | |||
| + | ==Beam without any cryo and with some cryo to LHRS and Moeller== | ||
| + | |||
| + | ===Moeller commissioning=== | ||
| + | Goal: [http://www.jlab.org/~moller/docs/dvcs_run_plan.txt moller_run_plan] <br> | ||
| + | Need: some cryo to cool down the solenoid<br> | ||
| + | Method:Note that the beam will need to bypass the Compton chicane for the Moller setup. It ''may'' be most efficient to do this beam tune before running the beam optimization study through the Compton chicane.<br> | ||
| + | Contact: J. Zhang, Sasha Glamazdin<br> | ||
| + | |||
| + | ===LHRS re-commissioning=== | ||
| + | Jack Segal says that the LHRS power supplies have seen major repairs | ||
| + | over the down and will require re-commissioning once the magnets are | ||
| + | cold and can handle full current. He's estimating 2--3 day shifts | ||
| + | (which includes some time for dealing with problems that may come up). | ||
Latest revision as of 15:37, 15 October 2010
Back to DVCS
Back to Daily_Run_Plan
- Most recent RC status update: HALOG 332914 [Monday 09-27-2010 11:15am]
Contents
Beam no LHRS, no solid target, no cryo target
We will start with a 5 passes beam. The tasks below appear roughly in order of priority, one assumes that we have solid targets in place.
Getting beam threaded down to the dump for the first time
Beam quality optimization study
Goal: optimize beam quality to limit noise in calorimeter, once shoot for something like 100 Hz in the detector per uA of beam.
Need: working Compton photon detector with appropriate HV and threshold settings, working Compton DAQ that can provide scaler data to the appropriate EPICS channel
Contact: Eric Fuchey for Compton, Yves Roblin (MCC) support for beam manipulation (Note: Jay is focused on Qweak optics)
BPM calibration
Goal: check response of the BPMs to know motion of the beam
Need: Harps working, BPMs reading at least through EPICS, 5uA beam
Method: For each of the following approximative beam position, record beam position with the BPMS and with the harps. Beam position : (0,0), (0,2), (0,-2), (2,0), (-2,0)
Contact: J. Roche.
BCM calibration
Goal: calibrate BCM readings between 0 and 20 uA, with special care to readings between 2 and 7 uA
Need: BCMs reading in a coda file, any DAQ setting will do
Method: MCC procedure (MCC-PR-04-008) [[1]]
BCM log file is documented in d2m wiki [[2]]
Key for BcmLog files
Column headings for BCM log file (from Vince via Kalyan):
* Entry #
* BCM 1 voltage (upstream BCM)
* BCM 2 voltage (downstream BCM)
* Unser (not used)
* Faraday Cup (if extracted = 0)
* 0L02 (injector reading)
* 0R07 (not used)
Contact: J. Roche
Raster size calibration
Goal: to check the raster size against effective readout.
Need: BPM calibration, 5uA, BPM readings in a coda file to be able to run spot++ (Need to define DAQ setting : T8 ??)
Method: vary the size of the raster, take one run for each of the following MCC unit raster size (3*2), (7*5), (10*8), produce spot++ image at each setting. Those settings are taken off that page [[3]]
Contact: J. Roche
Energy measurement
Goal: to know the beam energy to 10-4
Need:the ninth dipole to work
Method:MCC procedure MCC-PR-04-006 [[4]]
Contact: A. Saha
Compton work??
Not sure what to put here... Can we do things with the 5-pass beam?
Contact: C. Hyde??
Cavity monitors checkout
Again not sure what goes there...
- John Musson, Bob Michaels, Zafar Ahmed (PREx) know the system
- at minimum, we need to make sure that the amplifier settings are such that the the system can safely take beam
Beam with no LHRS, no cryo target but solid target
Luminosity detector check out
Goal: check that the lumi detector scaler readings make sense eg: rates versus beam current
Need: carbon target and beam varying between 0 and 20 uA
Method: take short runs with various beam intensity
Contact: K. Allada
Center beam on target
Goal: get the beam to hit the center of the holed carbon foil
Need: BPMs reading at least through EPICS, single rates in the calo??
Method:Insert Beo target, shoot 5uA and center un-rastered beam on the center of the Beo target. Insert holed Carbon target, turn on ratser, take a run with single in the calo ??
Contact: C. Munoz Camacho
Establish maximum luminosity sustainable by calo
Goal: to define luminosity at which we are getting too many pile-up in the ARS (not ideal on the carbon target...
Method: ??
Contact: C. Munoz Camacho
Elastic counts in the Calorimeter
Goal: exercise our reading of the calo
Need: solid Carbon target, ARS readout, to define the calo angle, distance to target
Method: ??
Contact: C. Munoz Camacho
Beam without any cryo and with some cryo to LHRS and Moeller
Moeller commissioning
Goal: moller_run_plan
Need: some cryo to cool down the solenoid
Method:Note that the beam will need to bypass the Compton chicane for the Moller setup. It may be most efficient to do this beam tune before running the beam optimization study through the Compton chicane.
Contact: J. Zhang, Sasha Glamazdin
LHRS re-commissioning
Jack Segal says that the LHRS power supplies have seen major repairs over the down and will require re-commissioning once the magnets are cold and can handle full current. He's estimating 2--3 day shifts (which includes some time for dealing with problems that may come up).
