AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40
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Message ID: 509     Entry time: Thu Dec 1 00:21:08 2016
Author: DK 
Subject: Offline analysis of R42_7 

Checking that the implantation is still reasonable after LN2 fill recovery. 

Degrader condition is 8. + 0.2 mm Al on the upstream side of the PE wall.

All three variable degraders are in (0.5 mm W; 0.3 mm W; 1.0 mm W, each on 1 mm Al backing). 

Confirmed degrader settings at 10.11 (right before a change was made after this run...)

 *** data items:  261088000 ( 125355.46 Hz)
 *** ADC events:   32885891 (  15789.41 Hz)
 *** time warps:          0 (      0.00 Hz)
 *** DSSSD # 1 count:   5369750 old count:   5351200 dt:    283.23 s  LEC rate:  18958.97 Hz
 *** DSSSD # 2 count:   4958223 old count:   4941299 dt:    283.23 s  LEC rate:  17505.99 Hz
 *** DSSSD # 3 count:   2872405 old count:   2862650 dt:    283.23 s  LEC rate:  10141.59 Hz
 *** DSSSD # 4 count:   2367926 old count:   2359880 dt:    283.23 s  LEC rate:   8360.43 Hz
 *** DSSSD # 5 count:   2063809 old count:   2056797 dt:    283.23 s  LEC rate:   7286.69 Hz
 *** DSSSD # 6 count:   3582944 old count:   3570809 dt:    283.23 s  LEC rate:  12650.29 Hz
 *** DSSSD # 1 count:        61 old count:        61 dt:    283.23 s  HEC rate:      0.22 Hz
 *** DSSSD # 2 count:        82 old count:        82 dt:    283.23 s  HEC rate:      0.29 Hz
 *** DSSSD # 3 count:       111 old count:       111 dt:    283.23 s  HEC rate:      0.39 Hz
 *** DSSSD # 4 count:        71 old count:        71 dt:    283.23 s  HEC rate:      0.25 Hz
 *** DSSSD # 5 count:        42 old count:        42 dt:    283.23 s  HEC rate:      0.15 Hz
 *** DSSSD # 6 count:         9 old count:         9 dt:    283.23 s  HEC rate:      0.03 Hz

 *** ENTRY finish ends

S O R T    S T O P P E D ..... Thu Dec  1 09:11:23 2016

 

See attached histograms
 

Figure 5 shows low energy front and back, and if I compare to R41_2 offline analysis (i.e. https://elog.ph.ed.ac.uk/AIDA/507 ) then we see more fluctuation (of light ions?) it seems. Run 41_2 seems to show mostly noise (anti correlation) and here we see real ions (positive correlation.  This is confirmed in our figure 4, where the statistics of DSSD#3 seems about doubled.  The event rate per unit time in 41_2 shows a relatively flat top behavior characteristic of noise domination, where as our present one shows more jitter that could be characterized by light ion production and transport variation.

 

Attachment 1: r42_2110.png  37 kB  | Hide | Hide all
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Attachment 5: r42-2000.png  44 kB  | Hide | Hide all
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