Difference between revisions of "Run Planning Meeting Notes, Oct 25-Oct 31, 2018"

Revision as of 08:31, 31 October 2018

Last 24h
- Took data when beam was available
- Lost about ~6h beam
  - Hall B Spin dance: 5pm - 10pm
  - Accel. issues
- Beam has been taken away ~7am this morning
Issues and current status
- Detector is on standby (empty target, coll. blocked,...)
- Accel. changed RF recovery to " General" recovery
- Hall D is in restricted access, Tagger hall will be soon
- Shifts between 8am and 4pm are on standby
Reports
- Beam energy monitoring
Plans
- Accelerator
  - Recovery
  - Hope beam to be back this afternoon
- Hall D
  - CompCal
  - Walk through
  - Any other work?
- Once beam is back
  - Harp scan
  - Empty target run
  - Return to production data
AoB
- Free shifts available

Weekend: 10/26-10/28
- Stable beam and smooth data taking
- Changed beam current for AMO radiator from 180nA to 200nA
- Collected ~7.5 x 10^9 evts
- Performed harp scans every evening
Issues and current Status
- Main reasons for no data taking
  - Harp Scans ~30min
  - A few DAQ crashes
  - Beam down times ~30min (max. of 2h without beam)
- BTA was partly not available
Reports
Plans
- Accelerator
  - Mean studies on Monday (does not affect beam availability)
  - RF recovery on Tuesday
- Hall D
  - Continue production runs until Tuesday morning
  - Tuesday
    - Go into restricted access on Tuesday for work at CompCal
    - Empty target run after RF recovery
AoB
- Open shift slots

Last 24h
- Shifts were on standby until 8pm
- Hall went into beam permit ~8:30pm
- Filled target, performed harp scans, checked radiation levels
- Started taking data with AMO ~10:40pm
  - Cycled through the production sequence
  - Collected ~800M Evts so far
Issues and current Status
- Minor DAQ crashes
- No beam for ~15min, 1L22-7 tripped
- Data taking runs smoothly right now
Reports
- Monitoring
- Rates after accel. tests
- Beam energy after accel. tests
Plans
- Keep taking data over the weekend
- No requests for additional tests/checks/measurements so far
- Accel.
  - Beam studies on Monday
  - RF recovery on Tuesday
AoB
- No meeting during weekend

Last 24h
- Took data with 180nA beam until 9:00am
- Emptied target, coll. to block, gon. to blank
- FCAL Base replacements
Issues and current Status
- Hall is in controlled access
- Accell.
  - Extended phaser studies/tests into swing-shift
  - Master Oscillator Modifications (MoMod) ~8h begin in swing-shift
- Earliest to expect beam: Around owl-shift (i.e. Friday)
Reports
- Monitoring
- Rates in TAC run
Plans
- Today
  - Work in hall (stay in controlled access)
    - BCAL (Elton)
    - TOF (Beni)
    - Walk through(s)
  - Shifts are on standby until 11:59pm today
  - IF beam is back:
    - Fill target, perform harp scans, check radiation levels, PS-rates,...
    - Start data taking with AMO @ 180nA
- Upcoming days
  - Take data as soon as beam is available
  - Accel.
    - Beam studies on Monday
    - RF recovery for Tuesday, need to re-tune one of the cavitis
AoB

@@ Line 11: / Line 11: @@
 #** Continued production sequence
 # Issues and current status
+#* Taking data
 # Reports
 #* [https://logbooks.jlab.org/entry/3617806 FCAL base replacements]
@@ Line 17: / Line 18: @@
 #* [https://logbooks.jlab.org/entry/3618293 HDvis]
 #* [https://logbooks.jlab.org/entry/3618259 Summary of last week]
-#** Collected ~11x10^11 Events
+#** Stable beam over the weekend
+#** Minor DAQ issues
+#** Collected ~11x10^9 Events
 # Plans
 #* Accelerator
@@ Line 24: / Line 27: @@
 #* Hall D
 #** [https://halldweb.jlab.org/wiki-private/index.php/2018_Low_energy_measurements#Proposal_Summary Low energy measurements]
+#*** E_beam = 11.6 GeV, E_g = 7GeV
+#*** All TAGH counters + nominal PS field
+#*** Beam current ~25nA
+#*** Take data with this setup ~2h
+#** Any other plans/task?
 # AoB
 #* Free shifts! Take one, get one cookie for free!