ELOG CARME

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

CARME

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Entry time:

Wed Mar 2 19:25:25 2022

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20:25

Observed short burst of low energy noise on aida1, lasted &lt;30s (attachment 8).

Temperature setpoint = 113 K

Target density OK S1 vaies between 2E-8 and 3E-8 mbar, E4 between 1E-9 and 1E-8 mbar.

Detector moving well between 23.1 mm and 67.43mm, move in and move out counters the same. Correlation scalar on aida1.

Rutherford peak varies between 10^3 and 10^2 depending on detector position, noise peak varies with detector position -&gt; lower further in.

Beam intensity ~1E8

Merger OK

Data rate ~ 1900 Kb/sec

Leakage current = 3.208 uA

Temperatures OK

System checks - wr fails

&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; Base &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;Current &nbsp;&nbsp; &nbsp;Difference 
aida01 fault &nbsp;&nbsp; &nbsp; 0xab60 : &nbsp;&nbsp; &nbsp; 0xaba4 : &nbsp;&nbsp; &nbsp; 68 &nbsp; 
aida02 fault &nbsp;&nbsp; &nbsp; 0x88d3 : &nbsp;&nbsp; &nbsp; 0x8915 : &nbsp;&nbsp; &nbsp; 66 &nbsp; 
aida03 fault &nbsp;&nbsp; &nbsp; 0x23aa : &nbsp;&nbsp; &nbsp; 0x23ee : &nbsp;&nbsp; &nbsp; 68 &nbsp; 
aida04 fault &nbsp;&nbsp; &nbsp; 0x15d7 : &nbsp;&nbsp; &nbsp; 0x161b : &nbsp;&nbsp; &nbsp; 68 &nbsp; 
aida05 fault &nbsp;&nbsp; &nbsp; 0x2f03 : &nbsp;&nbsp; &nbsp; 0x2f20 : &nbsp;&nbsp; &nbsp; 29 &nbsp; 
White Rabbit error counter test result: Passed 0, Failed 5

Understand the status reports as follows:- 
Status bit 3 : White Rabbit decoder detected an error in the received data 
Status bit 2 : Firmware registered WR error, no reload of Timestamp 
Status bit 0 : White Rabbit decoder reports uncertain of Timestamp information from WR

Avg ring pressure = 5.5 E-10 mbar. Ring pressure tends to oosciilate between ~4 and 5.5 E-10 mbar

21:21

Burst of noise not observed again