Make New Entry, Make Followup Entry
User name pzhu
Log entry time 08:40:14 on May 5,2012
Entry number 382416
keyword=updated Left arm happex and fastbus bpm calibration constantI updated Left arm happex bpm calibration constant by using old method(three point, use [x+ - x-]/[x+ + x-]), because this method will have nonlinearity affect if the distance is too large, it is not very accurate. I will calibrate it again by using another method later.
These three points are used for calibrate:(harp position)
BPMA pos: {-8.175737,-2.054247}
BPMB pos: {-8.273912,-2.010925}
BPMA pos: {7.172540,-6.094017}
BPMB pos: {7.407159,-6.176232}
BPMA pos: {-4.744781,-7.275049}
BPMB pos: {-4.702995,-7.396432}
Also I updated Left arm Fastbus BPM calibration constant by using the same method.
FIGURE 1
