Page History

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

attempt to get different ions by shooting beam through a target
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

2582-2594

attempt to get different ions by shooting beam through a target
played with fifo settings to reduce fifo full errors
rate increased to 1KHz from run 2590 on
wrong energy in the database (1.5 instead of 1)

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 Xe beam while taking scintillation measurement

  Energy

scan 0 degree

nov 19

C

600MeV/n - 1.5GeV/n in steps

~600Hz 200Hz

nominal

BT50,BT51,BT53

  attempt to simulate different ions by varying ionization energy

compare with runs taken before Xe beam

Very low rate

nov 19

C

1.5GeV/n

as low as possible

nominal

BT50,BT51,BT53

Energy scan

nov 19

C

  TBD  

~100Hz

nominal  
 

BT51

  increase statistics or configuration with C beam until beam is off

attempt to simulate different ions by varying ionization energy