Jefferson Lab Hall C Logbook for March 12 - Beam

  • Main INDEX

    Saturday

  • 261958 03/31/12 15:38  elaasar        Beam: The beam was off

  • 261926 03/31/12 10:55  elaasar        Beam: The beam is unstable

  • 261905 03/31/12 07:37  benesch        Beam: I don't understand the BMOD archived signals at all

    • Friday

  • 261777 03/30/12 14:48  Benesch        Beam: five minute USLAW modulation was seen 3/25

    • Thursday

  • 261433 03/29/12 01:30  covrig         Beam: coulomb counter q.

    • Wednesday

  • 261324 03/28/12 09:30  smithg         Beam: turned off MD & lumi HV while tune beam is in the hall

  • 261322 03/28/12 09:17  smithg         Beam: beam down cuz of cavity problems

  • 261317 03/28/12 08:41  benesch        Beam: MOmod was likely bad all night hence double peaks

  • 261282 03/28/12 04:47  jdiefen        Beam: Stopped run to wait for recover from beam trip

  • 261255 03/28/12 00:58  jdiefen        Beam: 3C12X diff width

  • 261250 03/28/12 00:39  jdiefen        Beam: Beam to hall C restored

  • 261248 03/28/12 00:31  jdiefen        Beam: No beam for 5 to 10 minutes

    • Tuesday

  • 261176 03/27/12 13:46  Spayde         Beam: CW Beam in Hall

  • 261071 03/27/12 05:47  jdiefen        Beam: Lumi asym widths and 3c12x diff width got better

  • 261060 03/27/12 05:27  jdiefen        Beam: MCC Sending Tune Beam

  • 261032 03/27/12 02:54  jdiefen        Beam: 3c12x diff width happened to be broad before

    • Monday

  • 260902 03/26/12 06:31  jdiefen        Beam: Beam off for about 12 hours

  • 260881 03/26/12 03:20  jdiefen        Beam: Charge asym width back to 400ppm

  • 260875 03/26/12 02:58  jdiefen        Beam: Asked MCC about charge asymmetry width

  • 260870 03/26/12 02:03  jdiefen        Beam: Flipped IHWPs to OUT/OUT

    • Sunday

  • 260817 03/25/12 19:56  benesch        Beam: USLumiAsymWidth is connected to modulation 

  • 260781 03/25/12 16:12  benesch        Beam: USLumi width modulation? 

  • 260763 03/25/12 13:12  Spayde         Beam: Changed IHWP State to IN/OUT

  • 260730 03/25/12 08:49  Spayde         Beam: Changed IHWP State to OUT/OUT

    • Saturday

  • 260591 03/24/12 09:33  Spayde         Beam: Interesting ELOG Entry on Vacuum Incident

  • 260584 03/24/12 08:22  Spayde         Beam: Status

    • Friday

  • 260485 03/23/12 15:42  Spayde         Beam: MCC Running fopt On Our Line

  • 260483 03/23/12 14:51  Spayde         Beam: Suggested Removal of Halo Target

  • 260482 03/23/12 14:36  Spayde         Beam: MCC Sending Tune Beam

  • 260480 03/23/12 13:22  Spayde         Beam: Beam Down for C100 Trip

  • 260479 03/23/12 13:10  Spayde         Beam: Beam is Coming Back

  • 260459 03/23/12 09:49  Spayde         Beam: Beam Going Away for Hall B 5 Pass Turn-On

  • 260453 03/23/12 09:23  Spayde         Beam: MCC Sending Beam

  • 260447 03/23/12 08:23  Spayde         Beam: Beam Down for C100 Trip

    • Thursday

  • 260359 03/22/12 16:17  Spayde         Beam: Late Entry:  Halo Characterization

  • 260301 03/22/12 09:22  Spayde         Beam: Changed Half-Wave plate State to OUT-IN

  • 260262 03/22/12 03:36  Adesh          Beam: beam down due to C100 issue

    • Wednesday

  • 260128 03/21/12 08:24  Spayde         Beam: Beam Studies Have Begun

    • Tuesday

  • 259924 03/20/12 13:45  Spayde         Beam: Current Beam State

  • 259891 03/20/12 10:37  Spayde         Beam: Switched Half-Wave Plate to OUT-IN

    • Monday

  • 259755 03/19/12 08:51  jroche         Beam: MCC starts the 4 and 5 pass setup for hall B

    • Sunday

  • 259632 03/18/12 15:24  dalton         Beam: halo monitors and uslumi width for 3C12 quad change

  • 259593 03/18/12 10:37  benesch        Beam: IPM3H09B died again, 0530 this morning

    • Saturday

  • 259429 03/17/12 16:13  jroche         Beam: BCM1-BCM2 double difference double peaked

  • 259424 03/17/12 15:34  dalton         Beam: halo monitors and uslumi width for quad change

  • 259408 03/17/12 14:11  dalton         Beam: halo responds to injector quad

  • 259407 03/17/12 13:47  dalton         Beam: failed to produce halo with 3C12 quad and C laser phase

  • 259404 03/17/12 13:13  jroche         Beam: Trying to create a halo

  • 259399 03/17/12 12:41  mjmchugh       Beam: Halo rate spikes

    • Friday

  • 259243 03/16/12 16:44  benesch        Beam: position differences under +-100nm for long runs 16647-16809

  • 259194 03/16/12 08:58  rob            Beam: changes to orbit?

    • Thursday

    

    Wednesday
    

  • 258894 03/14/12 17:51  dalton         Beam: Please get a halo measurement

  • 258853 03/14/12 14:35  jroche         Beam: asked for MoMOD to be turned on

  • 258851 03/14/12 14:26  jroche         Beam: asked for MoMOD to be turned on

  • 258834 03/14/12 12:25  jroche         Beam: 1/2h more?

  • 258824 03/14/12 10:26  jroche         Beam: MCC start checking phases through out the machine

  • 258818 03/14/12 09:42  benesch        Beam: linac MO connectors were tightened yesterday, entry wasn't made until this morning

  • 258811 03/14/12 08:58  jroche         Beam: no pass change today

  • 258737 03/14/12 00:18  donjones       Beam: 3c12x and MOMOD

    • 

    Tuesday
    

  • 258726 03/13/12 23:02  dalton         Beam: Another miracle

  • 258715 03/13/12 21:42  donjones       Beam: Halo too high as seen in upstream lumi widths. Called for dispersion measurment

  • 258704 03/13/12 18:17  smithg         Beam: 13 mm halo tgt

  • 258700 03/13/12 17:47  dalton         Beam: Does presence of halo target affect us lumi widths?

  • 258695 03/13/12 17:03  benesch        Beam: Hwien Saturday morning

  • 258685 03/13/12 13:48  jroche         Beam: helicity flipped at 30 Hz for an hour

  • 258653 03/13/12 08:20  jroche         Beam: Today's beam study will last "at least 2 hours"

    • 

    Monday
    

  • 258518 03/12/12 15:12  benesch        Beam: all of the halo is in the horizontal plane

  • 258517 03/12/12 14:37  jroche         Beam: halo target centering test

  • 258516 03/12/12 14:36  jroche         Beam: halo target centering test

  • 258496 03/12/12 12:29  dalton         Beam: Halo decrease also decreases background asymmetries

    • 

    Sunday
    

  • 258350 03/11/12 15:43  dalton         Beam: Plots of halo rates; is uslumi width a good halo detector?

  • 258340 03/11/12 14:03  AK Opper       Beam: Halo 4 rates and halo target

    • 

    Saturday
    

  • 258171 03/10/12 13:40  jroche         Beam: IHWP changed to (IN,OUT)

  • 258155 03/10/12 11:33  jroche         Beam: things are a bit more complicated than hoped for.

  • 258145 03/10/12 09:45  jroche         Beam:  injector tweaking trying to improve USlumi widths

  • 258139 03/10/12 08:42  jroche         Beam: running at 150 uA

  • 258138 03/10/12 08:16  jroche         Beam: IHWP changed to (OUt,OUT) before the starting run 16666

  • 258137 03/10/12 08:16  jroche         Beam: transmission problem in the injector

    • 

    Friday
    

  • 258026 03/09/12 16:29  dalton         Beam: Run numbers for first laser phase study

  • 258018 03/09/12 15:37  jroche         Beam: starting injector tweaking trying to improve USlumi widths 

  • 258015 03/09/12 14:55  jroche         Beam: HWP changed to (IN-OUT)

  • 258004 03/09/12 13:47  jroche         Beam: HWPs to OUt-OUT

  • 257978 03/09/12 10:40  jroche         Beam: Hall C back in Beam permit

  • 257966 03/09/12 09:18  jroche         Beam: Escorted access to Compton

  • 257954 03/09/12 08:21  jroche         Beam: No beam while MCC is tuning for Hall B

    • 

    Thursday
    

  • 257838 03/08/12 16:49  cornejo        Beam: Beam coming back to Hall C

  • 257825 03/08/12 15:55  rob            Beam: beam gone for a "quick test" by MCC

  • 257811 03/08/12 14:18  rob            Beam: 15 minutes down to restore cavities in south linac

  • 257792 03/08/12 12:25  rob            Beam: beam continues to be away for radiation monitor problems.

    • 

    Wednesday
    

  • 257565 03/07/12 15:17  rob            Beam: Beam away for "a little bit"

  • 257557 03/07/12 14:46  rob            Beam: phase adjustment is done, beam to return now

  • 257556 03/07/12 14:30  rob            Beam: beam to go away for some tuning

  • 257521 03/07/12 09:58  dalton         Beam: Regressed results from laser phase study

  • 257505 03/07/12 08:27  rob            Beam: beam is returning

    • 

    Tuesday
    

  • 257367 03/06/12 14:44  dalton         Beam: First results of laser phase study

    • 

    Monday
    

    

    Sunday
    

  • 257011 03/04/12 19:36  benesch        Beam: charge asymmetry width was correlated with hall A tune beam for a time 

  • 256953 03/04/12 10:57  benesch        Beam: my bad re Hall A Moller

  • 256921 03/04/12 07:59  benesch        Beam: Hall A Moller results

    • 

    Saturday
    

    

    Friday
    

    

    Thursday
    

  • 256416 03/01/12 17:00  dalton         Beam: Recent history of mdall sensitivities

  • 256394 03/01/12 15:07  dalton         Beam: Recent history of US lumi sensitivities

  • 256354 03/01/12 12:29  dalton         Beam: Laser phase study: mdall sensitivities

  • 256353 03/01/12 12:29  dalton         Beam: Laser phase study: mdall sensitivities

  • 256336 03/01/12 11:01  dalton         Beam: Laser phase study: US lumi regressed sensitivities