[Bteam] Notes from Monday's Compton Tune meeting

[Alexandre Camsonne]

>
> 1.6.1 TODO Communicate EPICS record name of the raw photon rate    Alex
>ComptonVfingerRate : scintillator on the side of the photon detector placed vertically
ComptonHfingerRate : scintillator  on the side of the photon detector
placed horizontally
ComptonCentralRate : Compton photon rate non normalized
compton:RATE_E : Normalized electron rate
compton:RATE_G : Normalized photon rate
MF2b1461_11ch1property.F : photon detecteur HV
MF2b1461_11ch1property.E : photon detecteur HV current
COM_DETPH_XCPOSai : table position X ( in beam position is 43.50 mm )
COM_DETPH_YCPOSai : table position Y ( in beam position is 43.75 mm )

There are some halo monitor before the Compton chicane, I guess I will
test them with a source to know which corresponds to which and have a
rate calibration.
Need to put them into EPICS they are only in the Compton DAQ

I have two counters that are not in place close from the photon
detector since the the change of the electron detector chamber.

I will check if I can get more of them for tomorrow, it will depends
on how much time we will be open too.

That will be a good time to survey the beamline and tour Mike in the Hall.

Alexandre
1.6.1  TODO Communicate EPICS record name of the raw photon rate
Alex - done above -
> The epics record name of all Compton epics records with human readable
> description should be communicated to OPS (Arne).
>
> 1.6.2 TODO Provide independent of compton equipment halo detector    Alex
>
> Either pick an existing detector that is tightly correlated to Compton
> detector that is robust and always on. Put it in EPICS and tell OPS about
> it. This detector should be stay on all the time and have stable
> configuration.
>
> 1.6.3 TODO Escort Mike Tiefenback on a tour in Hall-A    Alex
>
> 1.7 Thursday ( Monday ? )
>
> Check main machine, check/fix A orbit.
> Restore beam to A
> Check compton rates
> Load new Match quads
> Check compton rates
> Measure beam size will ALL accelerator harps in the A line.
> Go straight ahead mode (not through compton) and measure compton background. - done - background is low straight
>
> 1.8 Friday ( Tuesday ? )
>
> Null vertical spin component (Grames)
> Make A-B-C beams co-linear
> Look for obstruction in Injector
> Measure Compton
> Steering in 0L region vs. compton count rate.
> check 5 MeV dipole chamber
> ???
> ????
> ?????
> ??????
> ???????
>
> Author: Arne Freyberger <freyberg at jlab.org>
>
> Date: 2009-11-09 19:47:38 EST
>
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