Gaps in the DE-E maps

The reason for those is that the gains for the QDC high gain and low gain

region were determined wrong. The stretcher outputs are active and influence the

determination of the QDC gains. The CAT-module (Calibration & Timing) gives via

the Fast Bus back plane a variable voltage to the QDC input. There is now an

interaction between stretcher and QDC input giving rise to their nonlinear

behaviour. Volker examines if he sees linear behaviour with disconnected

stretchers.

PID for hodoscopes

of automatism to transform the data such that we can apply uniform particle

gates to get the PID. There are in moment 2 functions to use as PID:

• Mahi: to calculate DE as function of E with some fit parameters

  DE(E,z) = a(z) E**const + b(z) + c(z) E

  a(z) = alpha1 + beta1 z + gamma1 z**2

  b(z) = alpha2 + beta2 z + gamma2 z**2

  c(z) = alpha3 + beta3 z + gamma3 z**2

  
  

• Andrei: pid = DE ( E + a1 DE + a2 DE**2 + a3 DE**3)**b

  Adding up all detectors for both descriptions smears out the PID

  so that there is a normalization needed.

  
  

He6, He7.

DAQ news

• There is a program. which extracts data for detector subsystems in order to

  compress the amount of data.

  
  

• 16-20 Gb disk space for AXP612 will arrive soon.

  
  

• We need a short introduction in the calibration and parameter transforming

  features of PAW by Walter.

Scratch

• Carsten, Hsi and Wolfgang Quick take care about mechanical documentation (angle,

  distances) of the detectors

  
  

• Carsten and students will take care about electronic documentation (trigger...)