J. Roche's page on G0

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J. Roche's page on G0
last update : 03-03-04
I 'm trying to make links to entries on the logbook. If I missed some results, please let me know.

newly posted results :
03-03-04 : superharps, halo monitor, charge feedback
                     beam helicity properties (January summary)
                     NA deadtime studies
03-02-12 : pmt gain variation
                    proton peak position for I_SMS=5000 A
                    new inelastic contribution in proton cuts (results slightly different)
03-02-03 : deadtime sumary work at Grenoble
                    charge accumulated on target for LH2 data

The online analysis result page for

Beam

Superharps, halo monitor, charge feedback : J. Yun personal site
Total charge accumulated on target at I_SMS=5000 A #57716
Summary of helicity correlated beam studies to date

(03-01-13) : M. Pitt & J. Secrest #55913
(02-12-09) : M. Pitt & J. Secrest # 53611

Beam helicity properties (charge, positions, angles, energy) during asymmetry measurements : S. Covrig

Caltech site

as a function of hwp and run number state

as a function of hwp state :summary

Since October 02

charge asymmetry summary

BCM1 versus BCM2 calibration : Nakagawa #57023
Slope of BCM2 asymmetry -vs IA as a function of time (02-12-09) : T. Forest #53622
BCM 2 pedestal : T. Forest #53371
study of the bpms/cavities resolutions over time : A. Rauf
comparing charge asymmetry reconstructed by G0 strip line and by Hall C BCM : D. Armstrong.
Energy measurement #57088
Detector yield variation after beam trip #57117
Coarse luminosity monitor check #57209
Beam polarisation measurements #57339
Strange behaviour of bcm1 after beam trip #57502

Symmetry and Centering

the breakdown of task in this section is more rigid than what it is in reality, all those guys are working together

tof difference between pion and proton :

I_SMS=5000 A

tof proton pion differences : TE: G. Batigne

#55819

#55791

threshold studies : G. Batigne

#55909

I_SMS=4500 A

TE : B. Guillon #8046, G. Batigne

#53873

Fastbus :

lastest results

R. Neveling

#52354

R. Neveling, L Bimbot

#53784

for this last topic , the issue is the systematic measured between the na and the fr spectra

counting rates variation : G. Quemener, G. Batigne,K. Grimm #52136

beam hitting the target cell wall #51958

Yield variation as a function of beam position,angle,energy and charge

I_SMS=5000 A

Yield variation adn corrections : K. Nakahara

#57692

#57693

Target boiling

see results on Caltech page

Time Encoding tools (tof, asymmetries..)

asymmetry measurements I_SMS=5000 A :

widths K. Grimm # 56847
mean values #56849
detector 15 : asymmmetry versus time bin : L. Hannelius #57359
detector asymmetries versus octant number : A. Rauf #57381

asymmetry measurements I_SMS=4500 A

asymmetry changing sign with hwp insert : K. Nakahara, J. Liu #54743
a very preliminary FPD asymmetry analysis summary (02-11-30) : J. Liu #52882
proton asymmetries coherent to counting statistics : J. Liu #51963

determination of pid cuts

(optimal for french, NA work in progress) : B. Guillon #8020
NA poton cut variation over time

I_SMS=4500 A J. Liu #53871
I_SMS=5000 A R. Neveling #57804

deadtime

NA deadtime studies Jianglai's site
counting rates for different beam courants : Nakagawa # 57021 #57092
asymetries versus charge asymmetries :

study at I_SMS=5000 A (29 µA)

nominal setting for threshold run number summary , plots
lower theshold for Fr and higher for Na #55943
deadtime correction estimation G. Batigne #56049 and his summary page at Grenoble

study at I_SMS=4500 A run number summary (1µA) #53973, (5 µA) #54747 , (15 µA) #55078

summary plot

deadtime and false asymmetry : J. Liu #53875
Evaluation of single rates from fastbus data for deadtime corrections on TOF : A. Biselli #55087

inelastic proton asymmetries : dilution factors (two independant method with two different results)

Grenoble summary (contain also asymmetry results)
same evaluation with a different fit L. Hannelius #57815

Fastbus Tools

pmt gain checks and modification of HV accordingly :

I_SMS= 4500 A L. Hannelius, J. Roche #52165 #5700 #5833
I_SMS= 5000 A J. Roche #57737

measurement of the attenuation of the signal along the scintillators : A. Biselli
evaluation of non-proton event within the proton cut in tof plots
TDC, CFD resolutions : L. Hannelius, J. Roche #7114
NA threshold measurements using ADC spectra : J. Martin , some measurements #8023
TDC modules bin calibrations : J. Roche #5834

Electronics

DNL : G. Batigne, S. Covrig
check of the front back meantimer timing using fastbus data : A. Biselli #52862

Background

Target cell contribution :

empty target runs at I_SMS= 4500 A : J-S Real #56504
comparison tof spectra LH2, C12 : #52831
Comparison of tof spectra for hole targets and LH2 target results 1 result 2
Target window contribution in TED encoding (kind of simulation) J-S Real #53032

large single rates in the lower detectors

Hit of 3 GeV photons (produced in lh2 target) on the downstream plate of the cryostat J-S Real #53161
Effect of lead brick along teh rib of the magnet on octant 8 : S. Kox, G. Quemener #55435

Anode currents :

I_SMS=5000 A and after lead shielding installation

µA beam. H. Breuer

µA

µA : GB/KG

I_SMS=4500 A

effect of the Pb box (at 4500 A on C12 target ) : H. Breuer

#55574

search for signature of background with gain X4 : J-S. Real

#52886

Evaluation of the fraction of the anode current appearing in adc spectra : G. Batigne, T. Porcelli

results

Shielding studies

100 A, 12C : comparison Sept and Oct condition : with and without polyboron : C. Furget result
I_SMS=4500 A, Herbert paddle #2 reading for various shielding configuration#52142

Herbert paddle #1 reading summary #8468

I_SMS=5000 A,TLD readings #57233

Decoding, replay engine

120 Hz : J. Lenoble
Epics decoder : P. King
Data base implementation : D. Spayde

Miscellanous

Evidence of Hall A leakage in G0 data : L. Lee