Log entry time 11:16:41 on September 27, 2010

Entry number 332914

Mon Sep 27 11:14:56 EDT 2010
- See this link for a runplan outline
  https://hallaweb.jlab.org/wiki/index.php/Start_up_run_plan

- MCC/Accelerator
  - 'Hot checkout' of beamline magnets ONLY is deferred until Tuesday at
earliest
    - PD will check with Ron Lauze as to whether this early partial
checkout is
      worth the overhead
  x delivery to Hall B should happen today
    - note problem with CHL will shut things down tomorrow
  x some issues with cryo levels in RF zones over the weekend are to be
    investigated (CHL contamination problem?)
  x Harps, PSS tested ready to go
    x no "show stoppers" on MCC side other than cryo-related problems


- ESR
  x warmed up over weekend, cleared (they hope) the ice, recooling today

- CHL has contamination
  - 1--2 day down minimum, starting Tuesday morning
  - not sure how/if this impacts ESR cooldown
  - meeting on CHL issue at 1:30pm today

- Other Cryo-related issues:
  * Note that cooling the LHRS magnets will need to be done with Hall open
    - will take about a week to cool the magnets, 
    - my understanding is that we should be able to take some beam in the
      evenings in parallel with this process, but we will have to work
with the
      Techs on scheduling
  * Note that cooling target will need to be done with Hall open
  * Note that cooling Moller will need to be done with Hall open (just
guessing
    on this one)

- Target (Meekins)
  x spoke with Folts and Meekins
  - leak not found yet, still investigating this morning
  - in afternoon, Meekins will have to work on Qweak target...


- Arc Energy system (Arun)
  - 9th dipole is functioning
  - scanner HW and SW status unknown - emailed Arun requesting status update

- Lumis (Kalyan)
  x mostly ready, but noisy
    x is connected to RHRS scalers and injected using event 140 system
    - data aren't exposed to the software yet (not sure what the problem is)
  x lots of noise on system (ringing and 60Hz)
    - adding RC filter !?

- Moller (Sasha, Jixie)
  x ready to go, tested at 1kHz MPS --> HW and SW working
  x tested system with LED pulser, in good shape
  x magnet is already precooled using LN2, just waiting on ESR now
    - should be able to cool in a day or so
    - Note that cooling magnet will need to be done with Hall open (I
presume)
  - Note that we will eventually need to do alignment through solenoid, must
    bypass compton chicane for this
    - could impact scheduling of beam quality tuning
      - ie. do Moller alignment first, then steer and optimize through
Compton
        chicane?

- Compton (Eric Fuchey)
  x DAQ mostly ready
    - missing 'prescaler' <-- Alex
    - Megan Fried is the only person who really understands the DAQ software
      - she is willing/able to come onsite for 1--2 weeks, but this needs to
        be scheduled
  x HW 'should' be OK, but is is not powered on yet
  - Eric will work with others to test system and get back to me

- DAQ (Alex, others)
  - 'Logic module' needs to be updated/fixed so that LHRS and Calorimeter
    singles can be taken
  - there is discussion about requiring all trigs but T5 to be disabled
for the
    production configuration since the Calorim ADCs don't get gated on an
LHRS
    single
    - wasn't clear to me if the 'logic module' fix above solves this, or if
      there really does need to be multiple CODA configurations to handle
      singles triggers...
  - was problem with 1875 TDC in LHRS as of Friday
    - fixed, replace now?

- BPMs, BCMs, Raster status
  - all 'should' be plugged in somewhere, but not fully verified on
software side
    - BCM scalers are working
    - need to verify BPMs plugged into ADCs (in both arms!)
    - need to verify Raster signals plugged into ADCS (in both arms)

- Calorimeter (Alex)
  x ARS unit(s) had firmware updated over weekend
    - seems to have fixed a crash problem
  - some readout/sync errors remain
  - needs to be incorporated into complete DAQ (LHRS + Calorimeter) so it is
    possible to take singles
    - at the moment the Calorim ADCs only get a gate on a Calorim
trigger, any
      other trigger will cause a readout problem

- LHRS (Isham, Julie)
  - all detectors were working at one point, but haven't been tested for a
    while
    - can't take LHRS singles cosmics triggers in present configuration
  - EDTM status unknown
    - not clear if experiment cares about it
  - [Segal] NOTE that the power supplies have seem major repairs and need
to be
    recommissioned.  This will take 2--3 day shifts _after_ the magnets
are cold.