GSI program

Test multiple trigger engines prior to beam

nov 17

NA

NA

NA

NA

all BTs

change CNO thresholds, periodic frequency

Monitor beam rate and conditions

nov 18, 8-10

C

1.5Gev/n

50-500Hz

play with focus to change beam intensityon CU

BT53

2519-2522

spill is 6s long. monitor shows counts vary between 50-500Hz.
nominal focus gives beam spot on CU ~cm - ok.
used magnet steerer to center spot on desired position (X=108,Y=-42)

0 degree configuration
Tracker performance
Rate Scan 
5 hrs

nov 18 

C

1.5Gev/n

100-200Hz

nominal

BT50, BT51, BT54

2527-2534

250Kevts at ~200Hz
180Kevts at ~100Hz

CAL studies:
thierry(cuts,\\, Evslayer, quenching)
philippe: (Evslayer,Evslayervstime)
ACD: Eric(PHvstrackpos)
TKR: Leon (cuts ,cluster_width)

30 degree

nov 18

C

1.5GeV/n

260Hz

nominal

BT50, BT51, BT54

2535-2537 for beam tuning
2539-2545

660Kevts

-60 degree

nov 18 

C

1.5GeV/n

270Hz

nominal

BT50, BT51, BT54, BT56

2550-2553

645Kevts

beam through tower3 side, no ACD tile; BT50, BT51 have a CNO trigger engine which is not satisifed - most events are therefore read with the std engine auto-range, ZS associated with any other trigger than CNO

0 degree  

nov 18 7PM

C

1.5GeV/n

270Hz

nominal

BT3,BT50, BT51

2572-2576

2572 with BT3 (TKR only trigger) - 250Kevts
2573-2576 550Kevts
2576 (120Kevts) with special readout schema (half layers readout all left, half all right) and very low rate (5-10Hz) as a consequence of accelerator settings

noticed larger fraction of TEM errors (from 2% to 3.5%) - probably due to higher rate  in first part of spill when getting beam back from therapy
special tkr readout configuration significantly reduces number of TKR FIFO FULL errors

0 degree Xe

nov 19

Xe

1GeV/n

200hZ

nominal

BT50-BT51

2577-2581

played with fifo settings to reduce fifo full errors
collect ~600K

2577 very high rate (10KHz)
2578 steering magnet to center beam
2579 mostly periodic, very few Xe triggers
2580 unstable beam
2581 ext trigger

0 degree Xe on Al target

nov 19 4.30AM

Xe

1GeV/n

200Hz-1KHz

nominal

BT53 with different FIFO full settings
BT2
BT52

2582-2594

attempt to get different ions by shooting beam through a target
~1Mevts
attempt to get different ions by shooting beam through a target
wrong energy in the database (1.5 instead of 1)

2582 1.6KHz rate
2583 156Hz rate
rate >1KHz after 2590

scintillation measurement in CDE

nov 19

Xe
C

1GeV/n
1.5GeV/n

200Hz

nominal

NA

NA - contact Benoit to get data

place a CAL cristal in front of CU and record signal pulse
measurement performed with Xe beam with and w/o target and C beam

clear saturated signal from Xe, secondary peaks visible

charge injection with beam

nov 19

Xe
C   

1GeV/n
1.5GeV/n

600-1000Hz

nominal

CalibGen

Xe beam: 2595-2607
C beam: 2609-2621

performed with beam while taking scintillation measurement

Very low rate

nov 19

C

1.5GeV/n

as low as possible

nominal

BT58

2627

~15Kevts
~10Hz during spill
external trigger only, 4-rng, NZS

0 degree

nov 19

C

1.5GeV/n

~600Hz

nominal

BT50,BT51,BT53

compare with runs taken before Xe beam

not performed