16:00 Shift starts in the middle of shielding studies
with the HP detector (HP==Herbert's Paddle).
16:35 Jeff back from area
Has added 2sheets of lead on top and front : so now 4.6 lead total
on top and front (+ Al as usual)
17:00 Completed beam current scan (1,2,3,5 ľA) on
this configuration; ask for access.
17:10 Greg decide to cool down the target; asked MCC. As
we're using carbon target, that won't interfere with shielding study, but
it'll last a couple of hours.
17:15 Jeff back from the area.
Has added lead bricks on top.
17:40 End scan 1,2,3,5 ľA on this configuration; ask for
access.
17:45 MCC still waiting for final approval from cryo to
cool down the target.
18:20 MCC ready to start the cool-down of the target to15K
18:30 Back to beam permit (a survey was done meanwhile);
new configuration is paddle rotated 90 degrees, with Al shield
18:45 End scan 1,2,3,5 ľA; ask for access
19:10 Run 14553 : Cosmics run with NA thres= =5, Fr thresh
=25
19:15 Back to beam permit; new configuration : 2sheets
lead added on top
19:40 End scan 1,2,3,5 ľA; ask for access
Run 14554 : Cosmics run with NA thres= =5, Fr thresh =25
20:00 Back to beam permit; new configuration : 2sheets lead added
on top (4sheetstotal) (+Al)
20:15 End scan 1,2,3,5 ľA; ask for access
Run 14555 : Cosmics run with NA thres= =10, Fr thresh =50
20:45 Back to beam permit; new configuration : 2sheets lead on
front (2sheets total); none on top (+Al)
21:00 End scan 1,2,3,5 ľA; ask for access
21:15 Run 14556 : Cosmics run with NA thres= =15, Fr thresh
=75
21:30 Back to beam permit; new configuration : 2sheets lead added
on front (4sheets total); none on top (+Al)
21:50 End scan 1,2,3,5 ľA; ask for access
Run 14557 : Cosmics run with NA thres= =20, Fr thresh =100
22:15 Back to beam permit; new configuration(20) : borax added
+ lexan; Pb =2.3 mm
22:30 End scan 1,2,3,5 ľA; ask for access
23:00 Back to beam permit; new configuration(21) : took out the
borax
23:30 Asked for centered stable beam at 12ľA to start lumi
study
23:45 : Target LH2 seems Ok, dixit Greg ; Steve is going to
ramp magnet up "soon"
Run 14558-9 : Lumi study
0:00 Hand over to next shift...