Page History

1176 

tagged g

3GeV

 600

BT1

0 degrees, center of tower 2

yes 

events in twr3?

 1177-1180

tagged g

e beam at 2.5GeV

 600

BT1

0 degrees, center of tower 2

yes

magnet ON, 25K evts per run 

 1206

 tagged gamma

e-  1GeV

 240

  idem

 S0:14k count per spill
HW trg: 100 count per spill
DAQ trg: 100 count per spill
Lot of 0 cluster in chamber 2 and 3, we need to tune the bending magnet and/or improve the veto to select a small spot.

 1207

 11/8

 tagged gamma

  240

  idem

 idem with S1 in the trigger
this run is to see if the zero that we see is a trigger or magner problem: it seem that it's a trigger issue: now the fraction of zero seems similar to what we saw in the other physics runs. 

 1208

11/8 11h34

 tagged gamma

 e-
1 GeV

 240

  idem

yes

  New trigger S3 in veto  - 25k

 1209

 11/8
13h29 

 tagged gamma

 e-
1GeV

 240

 idem

 yes and no

around 30k : SYNCHRONIZATION LOST !
stopping the run, first 30000 events should well sycnhronized...  

1210 

 11/8
16h34 

 tagged gamma

 e-
1GeV 

 240

 idem

 yes

 Synchronized Tagged gamma with 1GeV electron beam, going for 70k to get all the statistic : 100Kevents
(+25 k from 1208 this cpunt is not taken into account in the eloogbook)

 1211-1213

 11/8

  Tagged

 1 GeV

180-240

  BT1

 30° (x,y,z)=(200,13.2,-48)

 various Magnet currents for setting up

 1214

 11/8

 Tagged

 e 1 GeV

 240

 BT1

 30° (x,y,z)=(200,13.2,-48)

  25k

 1215

 Tagged

 e 1GeV

 240

 BT1

 idem

 25k

 1216

 Tagged

 e 1 GeV

 240

 BT1

 idem

 25K

 1217

 11/8
21h22 

 Tagged

 e- 1 GeV

 240

 BT1

 idem

 30k
No spill during 4 minute

 1232

 12/08

 Tagged

 e- 2.5 GeV

 600

  BT1

 30° (x,y,z)=(200,13.2,-48)

 Not to be used , S4 not in the Trigger

 1233-1237

12/8 
7:21-9:36 

 Tagged

 e- 2.5

 600

 BT1

 idem

 1242

 12/8
11:45 

 e- 0.5 GeV

 100

  0 degrees, center of tower 2

 GeometryVerifiation

1243 

Tagged 

  e- 0.5 GeV

idem 

  0 degrees, center of tower 2

 yes

 rate too low

 1244-1245

12/08
12:44 13:35 

 Tagged

  e- 0.5 GeV

 120

  0 degrees, center of tower 2

 yes

 1246-1250

13:57 

 Tagged

  e- 0.5 GeV

120

  0 degrees, center of tower 2

 yes and no

 Sync lost after 6476 evts

1253-1258 

 tagged

e 0.5gev

 120

  0 degrees, center of tower 2

 yes

1272

13/8
3:52 

Tagged

e 2.5 GeV

600

48°

 Table moved to 48 deg, in order to allow full calrecon

 1273-1275

 13/8

Tagged 

e 2.5 GeV 

600 

 48°

 table@(-50,12.3,-48, 48deg)

 1276-1279

 13/8

 Tagged

 e 1GeV

 240

 48

idem 

 1287-1289

 13/8
11:07-12:41 

 Tagged

 e 0.5

 120

 48°

 Table(-50,12.3,-48, 48deg)
Trigger S0- S2- S4 -veto Sh - veto S3 - C1 - C2

 1290

 Junk

1181-1190

 8/8
9/8 

e+g

2.5

 600

BT1

0 degrees, center of tower 2

no

overall 2M evts  - (false report of 300 A for 1185 in elogBook)

1222

 11/8

  2.5 GeV

 0

30° (x,y,z)=(200,13.2,-48

yes

check beam position

 1223-1231

12/8 

e+g 

2.5 GeV 

 600

 BT1

idem 

 no

 rate stable after adjustement in run 1223
2.5 Mevents 

 1262-1271

 13/8
<3:02 

 e+g

 2.5

 600

 50°