Revision as of 13:10, 20 January 2015

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 = [[Mott Run 1 Journal]] =
-==Shift Summaries ==
-Blank Template - [[media:MottRun1Database.ods]]
-;Wednesday, Jan 14
-*'''[https://logbooks.jlab.org/entry/3317067 DAY]'''
-*'''[https://logbooks.jlab.org/entry/3317139 SWING]'''
-;Thursday, Jan 15
-*'''[https://logbooks.jlab.org/entry/3317273 SWING]'''
-;Friday, Jan 16
-*'''[https://logbooks.jlab.org/entry/3317419 DAY]'''
-*'''[https://logbooks.jlab.org/entry/3317433 SWING]'''
-*'''[[Media:Swing16Jan15_RunLog.ods]]
-*'''Dan created a new Mott [https://logbooks.jlab.org/entry/3317436 control screen (from command line for now)]'''
-;Saturday, Jan 17
-*'''[https://logbooks.jlab.org/entry/3317522 OWL]'''
-*'''[https://logbooks.jlab.org/entry/3317726 DAY]'''
-*'''[[Media:MottRun1Database_day17Jan15.ods]]'''
-*'''[http://www.example.com SWING]'''
-*'''[[Media:MottRun1Database_swing17Jan15.ods]]'''
-;Sunday, Jan 18
-*'''[https://logbooks.jlab.org/entry/3317827 OWL]'''
-*'''[https://logbooks.jlab.org/entry/3317923 DAY]'''
-*'''[[Media:MottRun1Database_owl18Jan15.ods]]'''
-*'''[[Media:thickness_runs.ods]]
-*'''[[Media:Day_shift_database.ods]]
-*'''[https://logbooks.jlab.org/entry/3317955 SWING]'''
-*'''[[Media:Swing_shift_database.ods]]
-;Monday, Jan 19
-*'''[https://logbooks.jlab.org/entry/ OWL]'''
-*'''[https://logbooks.jlab.org/entry/ DAY]'''
-*'''[[Media:Day_shift_Monday_database.ods]]'''
-*'''[https://logbooks.jlab.org/entry/ SWING]'''
-*'''[[Media:FINAL_run_database.ods]]
-=Experiment Goals and Plans=
-Tasks which have been studied or completed are shown below in '''bold face'''.
-== Prep Work (through Tuesday Jan 13) ==
-#'''Make a photocathode – SL5247-1 [https://logbooks.jlab.org/entry/3316714 made] about ~one week ago; QE [https://logbooks.jlab.org/entry/3317042 low] at low bias but ~1.8% at 130kV'''
-#'''Test IHA2D00 – the Aurora card was [https://logbooks.jlab.org/entry/3316983 replaced] to fix POT sampling and CAMAC wiring fixed for gain'''
-#'''Hi-Pot IP – 3D01 hi-potted, but still bad so [https://logbooks.jlab.org/entry/3316954 moved] to Dig#11 holding supply and 3D00 on Dig#12 monitors beam line only'''
-#'''CHL 2K cooldown – 1/13 successful cool down completed'''
-#'''Install laser – first [https://logbooks.jlab.org/entry/3317043 beam test] of Hall C laser with division by two rep rate'''
-#'''Test laser RF trigger – Riad is using Hall A laser as reference; appears to be 499/2^N'''
-#'''Verify beam line layout – completed'''
-#'''Build elegant deck – completed and stored at ~grames/elegant/MOTT/'''
-#'''Build qsUtility config file – completed, see below...'''
-== Injector Setup and Mott Checkout (Wed Jan 14 - Fri Jan 16) ==
-#'''Restore beam to FC2 @ 6.3 MeV/c - 1/14 task was completed and summarized in [https://logbooks.jlab.org/entry/3317071 link title]'''
-#'''Mott test: DAQ FADC/TDC synchronization and event separation with 62MHz; there is a TDC issue that prevents 62MHz so we use 31MHz with 31MHz trigger'''
-#'''Electron [https://logbooks.jlab.org/entry/3317058 bunchlength] and transmission from 0-10 uA'''
-#'''Tested harp IHA2D00 and it [https://logbooks.jlab.org/entry/3317133 works]'''
-#'''Scale cryounit for p=5.487 MeV/c and minimize energy spread - 1/14 see entry for [https://logbooks.jlab.org/entry/3317094 link initial setup]'''
-#'''[https://logbooks.jlab.org/entry/3317138 Tried] bunchlength script - didn't coverge, but looks like with more time can work'''
-#'''Calibrate BCM to FC2; [[Media:BCM-calibration-slope16jan15.ods]]'''
-#'''John [https://logbooks.jlab.org/entry/3317175 improved] the laser polarization and measured the Hall C laser [https://logbooks.jlab.org/entry/3317183 spot size]'''
-== Mott Setup and Systematics Testing (Sat Jan 17) ==
-#'''Setup good orbit to Mott [https://logbooks.jlab.org/entry/3317368 here]'''
-#'''Set PMT HV [https://logbooks.jlab.org/entry/3317401 here]'''
-#'''Set PMT energy thresholds are [https://logbooks.jlab.org/entry/3317405 here]'''
-#'''Finally we setup the polarization horizontally; [https://logbooks.jlab.org/entry/3317347 initial "rough in"] and the [https://logbooks.jlab.org/entry/3317584 final] here'''
-#'''[https://logbooks.jlab.org/entry/3317490 Calibrate] PITA vs IHWP IN/OUT'''
-#'''Finalize orbit w/ instrumental asymmetry, TOF and spectra'''
-#'''Adjust target offsets per vertical instrumental asymmetry [https://logbooks.jlab.org/entry/3317427 measured], [https://logbooks.jlab.org/entry/3317426 analyzed], and [https://logbooks.jlab.org/entry/3317428 corrected] with new offsets [[media:New_Ladder_Position_Swing16jan15.ods]] '''
-#'''[https://logbooks.jlab.org/entry/3317599 Measure] dump rate fraction to determine run times, [[Media:Dump_vs_Elastic.ods]]'''
-#'''Measure asymmetry vs. dead-time and beam current [[Media:Deadtime_spreadsheet.ods]]'''
-#Measure asymmetry vs. spot size (included emittance measurement and Elegant optimization)
-#Measure asymmetry vs. energy spread (includes harp scans, see e.g. [https://logbooks.jlab.org/entry/3317265 here]'''
-#Precisely measure beam momentum (includes BPM quad centering)
-#Measure asymmetry stability vs. time (by virture of the 1um Au tests interleaved w/ target foil extrapolation)
-== Target Foil Extrapolation (Sat Jan 17 - Mon Jan 19) ==
-#'''The list of targets and some description is describe in this [https://logbooks.jlab.org/entry/3317676 entry]'''
-#We are planning to interleave two 1um ~1uA (~15% dead) runs of IN/OUT between each foil
-#Test each new target foil to determine if energy spectra are good/bad.  If not acceptable or don't want to try, move on to next one, make log entry...
-=Procedures=
-== How to contact people ==
-;Joe's cell : 757-344-0188
-;Riad's cell : 757-254-7895
-== How to reach the Mott logbook ==
-;Mott logbook is [https://logbooks.jlab.org/book/mottlog here]
-== How to know who's on shift ==
-[[File:140112_shifts.png|thumb|center|300px]]
-== How to be a shift worker ==
-; Beam Driver = Shift Leader
-#Control delivered beam, especially adjusting PITA with IHWP=IN/OUT
-#Make sure FSD (BCM, Target) protection is used
-#Monitor beam loss and vacuum levels
-#Save and document settings
-#Write shift summary in logbook
-; DAQ Driver
-#Configure/Start/Stop DAQ
-#Monitor event rates and maintain dead time <5%
-#Coordinate run start/stop
-#COPY run information into standard excel sheet
-; Analysis Driver
-#Decode, analyze and inspect runs
-#COPY run information into standard excel sheet
-#Determine number of events needed for IHWP=IN and OUT
-== How to measure emittance ==
-; Beam Setup
-#We measure the beam emittance and Twiss at entrance of MQJ0L02 by varying MQJ0L02 and observing response on harp IHA0L03
-#To simplify matters we turn off the intervening quadrupoles (MQJ0L02A = MQJ0L03A =MQJ0L03 = 0)
-#Obviously, make sure beam can transports from MQJ0L02 to IHA0L03 w/ those quads off (use BPM's and viewers)
-#The configuration changes MQJ0L02 B for 21 K1 values (-3.0, -3.2, … , -5.8, -6.0); this takes ~45 minutes, so a smaller data set could be used too
-; qsUtility
-#We use program named qsUtility to automatically to make the measurements and analyze the data
-#The measurement configuration file is here and can also be used as a template /cs/prohome/apps/q/qsUtility/pro/fileio/config/IHA0L03_jmg1.xml
-#qsUtility is documented [http://opweb.acc.jlab.org/CSUEDocs/q/qsUtility/pro/doc/dataCollector_user_guide/dataCollector_user_guide.html here]
-; qsUtility assumes v=c
-#One must scale the Energy [MeV] entry box as the tool uses this formula B'L [G] = K1[1/m^2] * L[m] * E[MeV] * 10/0.2998
-== How to measure momentum ==
-; Note quads used for centering
-#MQJ0L02 = IPM0L02
-#MQJ0L03 = IPM0L03
-#MQD5D00 = IPM5D00
-#MQD5D01 = IPM5D01
-; Center quads
-#Mike Spata suggests standard dithering, as we do for solenoids
-#When complete update the BPM .SOF field and log result
-; Momentum measurement
-#Excite minimum number of correctors and record values
-#Set or measure BL using calculation on MDL0L02 control screen
-#Make note of BL for zeroing IPM0L02-IPM0L03 and IPM5D00-IPM5D01 with (intervening quads OFF, correctors OFF or recorded)
-#Calculate momentum from KE as p = sqrt [T*(2m+T)], so T = 5.0 MeV =>  p 5.487 MeV/c
-#Calculate fraction KE spread as dT/T = (T+2m)/(T+m) * dp/p, so dT/T=1.09 * dp/p @ T=5.0
-== How to use Elegant files ==
-; Elegant files for 2D, 3D, 5D, 0L regions
-# locate /grames/elegant/MOTT/mott3/
-# set mott3.ele beamline to be either 0L, 2D, 3D, 5D
-# set mott3.ele emittance, Twiss and momentum spread
-; To run
-# Copy files to local area
-# Interactively: Start IEE from terminal and then load elegant file: /grames/elegant/MOTT/mott3/mott3.ele
-# Command: From terminal execute elegant mott3.ele

Difference between revisions of "Run1 - January 2015"

Revision as of 13:10, 20 January 2015

Mott Run 1 Journal

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