Difference between revisions of "BMOD 06142019"
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Toll-Free Number (U.S.& Canada): 888-240-2560 | Toll-Free Number (U.S.& Canada): 888-240-2560 | ||
International toll number: 408-740-7256 | International toll number: 408-740-7256 | ||
| − | Bluejeans CODE: | + | Bluejeans CODE: 348 778 076 |
| − | Bluejeans link: https://bluejeans.com/ | + | Bluejeans link: https://bluejeans.com/348778076 |
Offline room: CEBAF Center F324-325 | Offline room: CEBAF Center F324-325 | ||
== Agenda == | == Agenda == | ||
| Line 29: | Line 29: | ||
== Minutes == | == Minutes == | ||
| − | Attending: Juliette, Paul, Victoria, Ye, Tao, Sakib | + | [[File:Bmod status.PNG|thumb|600px|right|Figure 1 - Summary and status of BMOD prep filled in during meeting. Red is needed; green is good to go.]] |
| + | |||
| + | |||
| + | * Introductions | ||
| + | * Overview - Victoria | ||
| + | ** detector response to changes in beam | ||
| + | ** sequentially move in set of directions (beam modulation) | ||
| + | ** detector yield vs. <beam position> => slopes | ||
| + | ** partial derivative of bpm (or detector) vs. driving coil => sensitivities | ||
| + | *** correlation plot or fit -> matrix, allows to calculate the slope | ||
| + | ** regression on natural beam motion also | ||
| + | * Status - Ye and Victoria | ||
| + | ** coils work, know which direction | ||
| + | ** don't know whether positive current means a certain direction | ||
| + | ** modulation controls - sends current to coils, pause FFB | ||
| + | ** know which BPMs, and which work (tested during APEX) | ||
| + | *** x motion the noise of the beam seemed larger | ||
| + | *** probably because of energy lock not being on | ||
| + | *** BPM12X at a location - should have large correlation with energy | ||
| + | ** don't know for a given coils - position and angle of beam (at target) | ||
| + | ** 5 BPMS 4AX, 4EX, 12X, | ||
| + | ** 3 x coils, 3 y coils - which is best to do analysis (Ye) | ||
| + | ** coil 1 and 3 for x may be different for PREX tune | ||
| + | ** Need a [[PREX2RunPlan2019#Establish Production Conditions | plan]] - Victoria will write it and circulate it | ||
| + | ** modulated data in main rootfile with a lot of branches | ||
| + | ** can make a special rootfile for only modulated data | ||
| + | ** "stuff" in the data stream indicating FFB paused, coils modulating, etc. - flags | ||
| + | * Software - Tao | ||
| + | ** Generic tools for analysis - multiple runs | ||
| + | ** calculating the slopes from cycles vs. runs from incomplete supercycles | ||
| + | ** more robust if data-taking is not ideal | ||
| + | * Aggregator - Sakib | ||
| + | ** Tao's scripts in aggregator | ||
| + | * Documentation needed | ||
| + | ** [[Beam_Modulation | From Expert Tools]] | ||
| + | ** [[Beam_Mod_Portal | From Documentation Portal]] | ||
| + | * meeting times | ||
| + | |||
| + | Attending: Juliette, Paul, Victoria, Ye, Tao, Sakib, Quinn, Dave Armstrong, Zeke | ||
Latest revision as of 15:33, 14 June 2019
In the process of editing and updating this page. Please contact Juliette Mammei crowder@jlab.org with questions or suggestions.
previous meeting << >> following meeting
PREX Main << Expert Tools << Beam Modulation << Meetings
Logistic information
BlueJeans calling instructions: Toll-Free Number (U.S.& Canada): 888-240-2560 International toll number: 408-740-7256 Bluejeans CODE: 348 778 076 Bluejeans link: https://bluejeans.com/348778076 Offline room: CEBAF Center F324-325
Agenda
- Introductions
- Overview - Victoria
- Status - Ye
- Controls - Tao
- Aggregator - Sakib
- Documentation needed
- meeting times
Minutes
- Introductions
- Overview - Victoria
- detector response to changes in beam
- sequentially move in set of directions (beam modulation)
- detector yield vs. <beam position> => slopes
- partial derivative of bpm (or detector) vs. driving coil => sensitivities
- correlation plot or fit -> matrix, allows to calculate the slope
- regression on natural beam motion also
- Status - Ye and Victoria
- coils work, know which direction
- don't know whether positive current means a certain direction
- modulation controls - sends current to coils, pause FFB
- know which BPMs, and which work (tested during APEX)
- x motion the noise of the beam seemed larger
- probably because of energy lock not being on
- BPM12X at a location - should have large correlation with energy
- don't know for a given coils - position and angle of beam (at target)
- 5 BPMS 4AX, 4EX, 12X,
- 3 x coils, 3 y coils - which is best to do analysis (Ye)
- coil 1 and 3 for x may be different for PREX tune
- Need a plan - Victoria will write it and circulate it
- modulated data in main rootfile with a lot of branches
- can make a special rootfile for only modulated data
- "stuff" in the data stream indicating FFB paused, coils modulating, etc. - flags
- Software - Tao
- Generic tools for analysis - multiple runs
- calculating the slopes from cycles vs. runs from incomplete supercycles
- more robust if data-taking is not ideal
- Aggregator - Sakib
- Tao's scripts in aggregator
- Documentation needed
- meeting times
Attending: Juliette, Paul, Victoria, Ye, Tao, Sakib, Quinn, Dave Armstrong, Zeke
