Main INDEX
Monthly INDEX
PREV
NEXT
User name Eric Voutier
Log entry time 00:19:45 on February 8,2000
Entry number 33078
keyword=Shift summary
New Crew on shift: Eric Voutier, Ole Hansen, Dimitri Margaziotis
***************
16:00 Beam is still off
17:30 MCC calls to inform that the PSS problem is progressing but not still
resolve. Their estimate is that the beam will not come back before midnight.
18:30 Program Deputy comes to tell that experts think to have find the PSS
the problem and are going to reset the whole interlock system... Beam may be
around 23:00...
22:00 Beam is back, we start checking the beam parameters and improve them
when necessary
HARP scan / Beam spot size: beam was coming back with the same parameters as
previous runs and with an aspect ratio of 1 to 2. The present ration is
Results from the scan 395
**********************************************
scanner # 5 TJ name=IHA1H03A
Wire combination H position V position
# 1 # 2 -330.um 76.um
# 1 # 3 -246.um 160.um
# 2 # 3 -246.um -7.um
weighted average -246.um 76.um
roll angle -6.315mr -0.362deg 0.000deg
Absolute beam h position: -246.um (+ means at beam left)
Absolute beam v position: 76.um (+ means too high)
Horizontal sigma (um): 109.
Elliptic approximation:
(tilt angle is from horizontal axis to major axis)
Vertical sigma (um): 185.241
Ellipse tilt angle (deg. clockw.): 93.8639
Ellipse major axis length (um) : 185.517
Ellipse minor axis length (um) : 108.937
**********************************************
scanner # 6 TJ name=IHA1H03B
Wire combination H position V position
# 1 # 2 472.um 44.um
# 1 # 3 448.um 20.um
# 2 # 3 448.um 69.um
weighted average 448.um 44.um
roll angle 1.877mr 0.108deg -0.350deg
Absolute beam h position: 448.um (+ means at beam left)
Absolute beam v position: 44.um (+ means too high)
Horizontal sigma (um): 106.
Elliptic approximation:
(tilt angle is from horizontal axis to major axis)
Vertical sigma (um): 99.4770
Ellipse tilt angle (deg. clockw.): 30.2349
Ellipse major axis length (um) : 108.769
Ellipse minor axis length (um) : 96.1163
**********************************************
23:00 OTR and Raster ---> see separate entries
23:30 Ready for data taking, increasing the current but the ion chambers trip when
going beyond 45um. The MCC understanding of that problem is that the OTR is
responsible for that !!! ?????
The philosophy is to take 100k data with 40um at the beginning and the end of each
1M events run with OTR in. For the 1M event runs, remove the OTR and increase
the current to the highest possible value.
23:52 Start data taking for kinematics 25
--- Run record for Kin #25
Last record from previous runs is :
Events Sum=3.8M 2bbu sum=320
This last number looks too optimistic, when applying more strict cuts (especially
y_tgt cuts) it comes about 50 (2bbu events/M raw events) leading to about 190
events. The target number of events is then 15M that should lead us to 11 hours
more of data taking on that point.
Run#/Start time/End time/Events number/Events Sum/2bbu sum/Comments
1988 / 23:52 / 00:05 / 100 k / 3.9 M / 192 / OTR in