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User name X. Jiang
Log entry time 11:06:16 on June 4,2001
Entry number 61814
keyword=checked helicity-sign raw adc in espace
Checked helicity-sign raw-adc in espace, two arms are consistance to each other
and consistance with the counting house signal label.
What we did :
unplug the helicity "+" cable from the counting house, took cosmic run 1343 and 20345. In the analysis, out put raw helicity-sign adc from espace, (each arm has
four signals), the out put is, for the left arm:
ch1-adc= low(few hundred), ch2-adc=high (about 16383)
ch3-adc= low(few hundred), ch4-adc=high (about 16383)
on the right-arm:
ch1-adc= low(few hundred), ch2-adc=high (about 16383)
ch3-adc= low(few hundred), ch4-adc=high (about 16383)
Therefore the two arms are consistant to each other, and the sign convention
(ch1,ch3 are "+", and ch2, ch4 are "-") are consistant with the counting house
label. As long as the Moller follows the same cable labels, we will have the same
helicity sign as the Moller does.