Jefferson Lab Hall C Logbook for January 11 - Beam

  • Main INDEX

    Monday

  • 217600 01/31/11 17:24  benesch        Beam: trade-offs in Compton scintillator rate vs halo rates

  • 217581 01/31/11 15:57  birchall       Beam: Beam parameters since last Tuesday evening

    • Sunday

  • 217346 01/30/11 07:17  covrig         Beam: g0rate3 variation with raster size and beam position

    • Saturday

  • 217115 01/29/11 10:48  benesch        Beam: a look through the ops archiver

    • Friday

  • 216961 01/28/11 11:47  rob            Beam: halo rates fell by factor ~60 when beam current dropped by ~half

  • 216944 01/28/11 10:09  rob            Beam: noise hypothesis: 60 Hz from new injector heater

  • 216889 01/28/11 00:48  kamyers        Beam: update on status

    • Thursday

  • 216839 01/27/11 17:26  carlini        Beam: Modifications to BCM's 5 and 6 electronics

  • 216835 01/27/11 16:10  benesch        Beam: gun status

    • Wednesday

  • 216631 01/26/11 10:21  benesch        Beam: 5 second spike source found!

  • 216629 01/26/11 10:11  saw            Beam: Injector studies starting

  • 216570 01/26/11 02:52  kamyers        Beam: Having trouble at 20 uA now

  • 216551 01/26/11 00:44  kamyers        Beam: Update on beam status - 20 uA for now

    • Tuesday

  • 216505 01/25/11 20:32  Page           Beam: Beam halo at 80 uA

  • 216500 01/25/11 19:59  Page           Beam: Update on beam - not very good

  • 216448 01/25/11 08:51  birchall       Beam: 5 s spikes

  • 216447 01/25/11 08:46  birchall       Beam: Run 9421: 5 s spikes remain

    • Monday

  • 216397 01/24/11 21:26  Page           Beam: Beam has really high halo rates

  • 216319 01/24/11 07:24  covrig         Beam: Qtorr OFF

  • 216303 01/24/11 04:28  covrig         Beam: chl crashed kind of hard

    • Sunday

    

    Saturday
    

    

    Friday
    

  • 215830 01/21/11 13:04  Carlini        Beam: Quick Check by Injector group on Intensity Feedback

    • 

    Thursday
    

  • 215667 01/20/11 20:05  benesch        Beam: tiny beam at 3C20

  • 215641 01/20/11 18:42  Birchall       Beam: Maximum beam current

    • 

    Wednesday
    

  • 215378 01/19/11 17:19  benesch        Beam: three injector changes to investigate five second spikes

    • 

    Tuesday
    

  • 215224 01/18/11 21:48  wdconinc       Beam: Progress on prebuncher, updated run plan

  • 215214 01/18/11 19:04  wdconinc       Beam: limited to 10uA tonight

  • 215209 01/18/11 18:36  benesch        Beam: prebuncher broken

  • 215196 01/18/11 16:41  saw            Beam: Betabrite fixed

  • 215187 01/18/11 15:43  benesch        Beam: kHz spikes in beam loss accounting are the Pockels cell and IHWP; prebuncher and 9kHz

    • 

    Monday
    

  • 215029 01/17/11 20:12  A. Micherdzi   Beam: Jay Benesh called, we have beam back at 100uA over the night; tomorrow furher investigation to get back  to 150uA.

  • 215023 01/17/11 19:29  A. Micherdzi   Beam: MCC will take a beam away for ~0.5h; to diagnose problem with a beam optics in the injector.

  • 215016 01/17/11 18:01  Page           Beam: Seems to be injector problems

  • 214966 01/17/11 12:32  benesch        Beam: beam width in Compton

    • 

    Sunday
    

  • 214857 01/16/11 20:54  wdconinc       Beam: Back to 150uA after injector work by Reza

  • 214848 01/16/11 19:29  A. Micherdzi   Beam: MCC finished beam study, beam is ok now; HW plane is out 

  • 214810 01/16/11 14:33  wdconinc       Beam: More injector studies at 5pm

  • 214741 01/16/11 01:12  wdconinc       Beam: Injector problems prevent > 100 uA

    • 

    Saturday
    

  • 214671 01/15/11 14:51  Adesh          Beam: Maximum beam we can get is 100 uA

  • 214653 01/15/11 12:21  Adesh          Beam: Beam back

  • 214636 01/15/11 09:17  Adesh          Beam: Still no beam

    • 

    Friday
    

    

    Thursday
    

  • 214299 01/13/11 19:35  wdconinc       Beam: 100 uA CW beam for BCM studies

  • 214295 01/13/11 19:00  wdconinc       Beam: Back to beam permit :-)

  • 214163 01/13/11 05:20  kamyers        Beam: bpm position and position difference plots first100k run 8909

    • 

    Wednesday
    

  • 213929 01/12/11 07:09  kamyers        Beam: bpm positions and position diffs - run 8866 110 uA

  • 213906 01/12/11 04:57  kamyers        Beam: bpm y diff run 8849

  • 213902 01/12/11 04:36  kamyers        Beam: BPM positions and position differences - run 8861

    • 

    Tuesday
    

  • 213843 01/11/11 23:55  magee          Beam: 75 uA, 3.5 mm raster

  • 213829 01/11/11 23:21  magee          Beam: Requested 50 uA.

  • 213800 01/11/11 18:29  magee          Beam: Requested beam through compton

    • 

    Monday
    

  • 213666 01/10/11 23:25  magee          Beam: Fast raster off

  • 213531 01/10/11 02:11  M Jones        Beam: Beam energy Measurement

    • 

    Sunday
    

    

    Saturday
    

  • 213128 01/08/11 15:46  benesch        Beam: energy measurement harps need to be checked

  • 213119 01/08/11 14:41  Armstrong      Beam: note: we are not going through chicane...

    • 

    Friday
    

    

    Thursday
    

  • 212663 01/06/11 09:43  dalton         Beam: Injector studies summary

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    Wednesday
    

    

    Tuesday
    

    

    Monday
    

    

    Sunday
    

    

    Saturday