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Fixed, e748, Thu Jul 6 19:17:12 2017, e748 MA, RUN, General, CD2, RUN 343
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Run 343
same conditions as run 342
beam=7uA
MUST2
-rw-r--r-- 1 e748 Exxx 2,2M 6 juil. 19:16 run_0343.dat.06-07-17_19h15m59s
Chio
-rw-r--r-- 1 e748chio Exxx 1,6K 6 juil. 19:16 run_0343.dat.06-07-17_19h15m50s |
Fixed, e748, Mon Jul 3 17:28:05 2017, e748 -Thomas R, Georges V, Sébastien H, CHIO, General, N/A, (Tentative) Solution to recover the CHIO: it works! 
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An interview of Th, Seb and Georges by Valérie on July 3rd.
Please indicate complements or corrections on this summary of the ionization chamber situation.
We list here the problems during the last days and the solution adopted to recover it...
The ionization chamber was not running. now it works with a modification of the capacitor connexion (see scheme +oscilloscope vizualization)
Two registered problems (for the moment, Ndlr Vlx):
I. The cables for the ChIo voltages were inverted.
First time inside the Chamber. On Thursday evening, signals with the Alpha source were correct but it appeared that
the output voltages were not correctly set.
This was solved on Friday 30th June opening the chamber and connecting again correctly INSIDE the chamber.
Secondly: it was seen today 3rd that the cables are not properly connected OUTSIDE the chamber,
they were inverted again between Anode and grid. Preamplis were burnt out.
On 4 available Preamplis (2 of 700 mV/MeV; 2 of 1 V/MeV) none remains.
We are running with one of 300 mv/MeV.
II. problem of the decoupling capacitance - off on the anode.
Possible solution could be to put the capacitance on the acceleration grid.
Same voltages will be applied, as before.
Proposed scheme (see photograph below, of the drawing made by Thomas):
________________________________ Cathode -3kV
-------------------------------- Frisch 0V
_______________________________ acceleration grid 960V <-----put capa HERE
________________________________Anode +2600 V <----capa (down! burnt out) was HERE
The electrons will be collected on the grid (if everything works well..)
See the oscilloscope view (Mtime 4µs):
- ch1 (1V) (yellow) analogic signal ChIo sent to ADC
- ch2 (50mV)(blue) PAC ChIo
- ch3 (1V) (pink) signal output of the discri
- ch4 (1V) (green) trigger LISE |
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Fixed, e748, Wed Jul 5 21:13:14 2017, e748 IS, RUN, General, CD2, RUN 331 scalers
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primary beam I = 6.5 uA unstable in the last 30 minutes (20h20 - 20h45)
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Fixed, e748, Wed Jul 5 19:10:33 2017, e748 DB&IS, ONLINE, General, CD2, tritons in the beam
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Tritons can be seen from the following plot. Some of them cross target frame and then lose 1.5MeV in the DSSDs.
12Be particles are stopped by the frame.
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Fixed, e748, Wed Jul 5 19:05:13 2017, e748 DB & IS, RUN, General, CD2, tritons in the beam
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Tritons can be seen from the following plot. Some of them cross target frame and then lose 1.5MeV in the DSSDs.
12Be particles are stopped by the frame.
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Fixed, e748, Wed Jul 5 17:15:57 2017, e748 DB, RUN, General, CD2, screenshot of scalers
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primary I = 6.9 uA
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Fixed, e748, Wed Jul 5 18:47:25 2017, e748 DB, RUN, General, CD2, new run - 331
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primary I = 6.9 uA
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Fixed, e748, Wed Jul 5 22:29:10 2017, e748 DB, ONLINE, General, CD2, trajectories
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Fixed, e748, Thu Jul 6 00:07:33 2017, e748 DB, ONLINE, General, CD2, Strips CATS raw
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Fixed, e748, Sat Jul 8 09:00:32 2017, e748 Anastasia, D. , RUN, General, N/A, error msg on run control (run 369)
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Fixed, e748, Sat Jul 8 09:19:37 2017, e748 Anastasia, D. , RUN, General, N/A, CATS raw 2D charge during run 369
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Fixed, e748, Sat Jul 8 09:43:17 2017, e748 Anastasia, D. , RUN, General, N/A, DAQ Parameters: Caviar new run 370
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Threshold of CAVIAR_DDM changed from ~ -800 to ~ -510
run 370 Triggering only in Cats to check CAVIARs new thresholds
-rw-r--r-- 1 e748 Exxx 5,5M 8 juil. 11:35 run_0370.dat.08-07-17_11h34m13s |
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Fixed, e748, Sat Jul 8 11:42:43 2017, e748 Anastasia, D. , RUN, General, N/A, new Run 371
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Triggers MUST2 and CATS as before,
-rw-r--r-- 1 e748 Exxx 16M 8 juil. 11:43 run_0371.dat.08-07-17_11h41m39s
new CAVIAR thresholds |
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Fixed, e748, Sat Jul 8 12:53:09 2017, e748 Anastasia, D. , RUN, General, N/A, RUN 371
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Changing Caviar thresholds during the run to find the optimum efficiency
More specific The DDM16_4 the channels 4 and 5 *
P.S. Lucia from the Lise team is here, working with Caviar |
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Fixed, e748, Sat Jul 8 14:00:06 2017, e748 Anastasia, D. , RUN, General, CD2, Run 372
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Start new run with final CAVIAR threshold settings
HV slightly increased to 980V
Scaler rate of CAVIAR is CATSx1.5 (same as before CAVIAR tripped)
Rest is unchanged
DDM16_1,DDM16_2,DDM16_6 all Channels 750
see the DDM16_3,DDM16_4, DDM16_5 |
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Fixed, e748, Fri Jun 9 14:41:54 2017, e748, CATS, General, , Runs 1 - 4
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| Tests alpha source, dummy data |
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Fixed, e748, Mon Jun 12 11:34:07 2017, e748, MUST2, Hardware, , MUVI cars setup
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We had problem with MUVI1 (pre serie 1) not working properly when a telescope was pluggeg (but fine otherwise).
Charles Houarner changed the card to MUVI serie 5, and the card is now working. |
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Fixed, e748, Mon Jun 12 11:36:34 2017, e748, MUST2, Hardware, , I2C error on Telescope
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At the Moment we got I2C error on the following detectors:
- T5 : waiting for SL cables
- T7 : waiting for SL cables
- T8 : waiting for SL cables
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Fixed, e748, Mon Jun 12 11:50:34 2017, e748, CATS, Software, , Settings QDC
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Gates QDC CATS1X, CATS1Y, CATS2X, CATS2Y: 0.996
Pedestal QDC CATS1X, CATS1Y, CATS2X: 0.5
Pedestal QDC CATS2Y: 0.699 |
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Fixed, e748, Mon Jun 12 11:52:16 2017, e748, CATS, General, , Run 6 and 7: Calibration Runs CATS
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Run 6: Calib CATS1 X&Y
--> Full, x2, x5, pedestal
Run 7: Calib CATS2 X&Y
--> Full, x2, x5, pedestal |
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