Log entry time 19:21:38 on November 07, 2009

Entry number 298181

This entry is a followup to: 298162

Followups:

• 298661 11/09/09 23:58 Jin Huang LD2 Target Aperture Scan

Trigger rate VS beam position scan is planned, as an attempt of locating LD2 cell centers. This survey starts from solid hole targets

18:10 5uA Beam on carbon hole target

• run 25317/4846
• L/R HRS T1/kHz : 0.98/0.37
• Hole centered

18:17 5uA Beam on dummy with hole, VDC HV ramping up

• run  : 25318/4847; 25319 with VDC ON
• L/R HRS T1/kHz : 3.2/1.0
• Hole centered on downstream foil.

18:17 2.1uA Beam on LD2 target

• run  : 25320/4848
• L/R HRS T1/kHz : 8.3/3.7
• Hole centered??

18:17 2uA Beam on LD2 target. run  : 25321-25322/4849-4850; VDC ON

• 2.10uA, BPM A = B = (-3.0, 2.0)mm -> L/R HRS T1/kHz : 8.3/3.7
• 2.10uA, BPM A = B = (-3.0, 0.2)mm -> L/R HRS T1/kHz : 8.2/3.7
• 2.07uA, BPM A = B = (-3.0, -2.0)mm -> L/R HRS T1/kHz : 8.0/3.7
• 2.08uA, BPM A = B = (-3.0, -3.0)mm -> L/R HRS T1/kHz : 7.9/3.6
• 2.10uA, BPM A = B = (-3.0, -4.0)mm -> L/R HRS T1/kHz : 7.9/3.7
• 2.12uA, BPM A = B = (-3.0, -4.3)mm -> L/R HRS T1/kHz : 8.0/3.7
• 2.12uA, BPM A = B = (-3.0, -4.3)mm -> L/R HRS T1/kHz : 8.0/3.7
• 2.12uA, BPM A = B = (-3.0, -5.0)mm -> L/R HRS T1/kHz : ???/4.2  -> Start run 25323/4851.

LHRS Q1 Dipole; RHRS Q1/Q3 tripped. Test suspended.

Cell wall was reached after moving beam Y by 7mm downward from nominal position. (to (-3.0, -5.0)mm)