User name R. Feuerbach
Log entry time 03:27:45 on October13,2005
Entry number 156696
Followups:
keyword=L-HRS alignment part 1After fixing the signal from the L-HRS Det2, run 2819 was taken with the HV on L-Det1 at -2100 (too high).
For run 2820, all the happex detector voltages were at the nominal -1900V, and a correlation between the firing of the happex detectors in the L-HRS and the track positions was verified. The position of the detectors in momentum-space is shown in figure 1.
Adjusting the momentum of the L-HRS by +55 MeV to 3.12044 GeV/c. Will change the septum setting after verifying the position.
Run 2821, P0L at 3.1204 GeV/c, P0R at 3.1176 GeV/c, has rates of:
L-Det1 = 74 kHz
L-Det2 = 124 kHz
L-S0 = 225 kHz
R-Det1 = 86 kHz
R-Det2 = 85 kHz
R-S0 = 220 kHz
The second figure shows the distributions for this "final-coarse" alignment (without septum adjustments).
FIGURE 1
FIGURE 2
