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--- strutture:lnf:da:plasmonx:lpa:spectrometer:v1commissioning:jul2012 [2012/07/12 17:24] – cgatti@infn.it
+++ strutture:lnf:da:plasmonx:lpa:spectrometer:v1commissioning:jul2012 [2012/07/25 12:30] (current) – faccini@infn.it
@@ Line 1: / Line 1: @@
+=== July 10th 2012 ===
+| Run | time | run conditions | comments |
+| 760 | 12:30 | pedestals| ch 0,1,2 with PMTs|
+| 761 | 12:40 | LED | HV on |
+| 762 | 13:00 | LED | HV on, change timing|
+| 763 | 18:35 | electrons  but not  to chamber | HV 900V|
+| 764 | 19:15 | electrons  but not  to chamber | HV 500V|
+| 765 | 19:45 | electrons  but not  to chamber | HV 500V, ch0 light tight, flanges darkened|
+| 766 | 19:57 | electrons  but not  to chamber | HV 500V, ch0 light tight|
+| 767 | 19:57 | electrons  but not  to chamber | HV 500V, ch0 light tight, dt=150|
+| 768 | 19:57 | electrons  but not  to chamber | HV 500V, ch0 light tight, dt=250|
+| 769 | 20:21 | electrons  but not  to chamber | HV 500V, ch0 light tight, dt=50, magnet on|
+| 771-781 | 22:31 |problems after powercut| trigger timing changed |
+| 782 | 0:21 |electrons in chamber|HV 500V, all light tight, dt=50, B=0 |
+| 783 | 0:21 |electrons in chamber|HV 500V, all light tight, dt=50, B=0.45|
+=== July 11th 2012 ===
+HW changes:
+) the second stage of the dual timer has been replaced by a Stanford for reliable and reproducible setting.
+) all five channels have been equipped with PMT+Electronics
+) the chamber of the spectrometer has been connected with the interaction region (i.e. the glass window removed)
+) a lead collimator has been inserted between the gas jet and the spectrometer
+Plan of the day:
+  A) scan in integration time to find the best timing [with small magnet in]
+  B) scan in HV to equalize gains [with small magnet in]
+  C) spectrum with B=0 and B>0 (with small magnet out, having subtracted the common background)
+|Run | time | run conditions | comments |
+|789 | 15:47 |No Beam HV on ch 0-4 500 V | pedestals|
+|790 | 16:22 |No Beam HV on ch 0-4 900 V | pedestals|
+|793 | 16:22 |electrons  | HV=500V. EM Noise is Back!|
+|794-797| 17-18| Trigger Test|the trigger doesn't works|
+|798| 19:38|T (signal splitting) removed from trigger |the trigger works|
+|799|19:44|HV = 0V, laser+plasma|Electronic noise|
+|800|20:00| HV=0, laser+plasma, reinforce grounding|
+|801|20:04| try HV=500 but impossible to take data|
+|804|22:50| HV=700 PMT 0, HV=0 PMT 1-4|saturation on PMT 0|
+|805|22:52| HV=600 PMT 0 1 2, HV=0 PMT 3 4|now verify that noise on PMT0 increases with num of connected cards|
+|806|23:26| HV=600 PMT 0 1 2, HV=0 PMT 3 4|only card 1 is connected, with the attenuator|
+|807|23:36| HV=600 PMT 0 1 2, HV=0 PMT 3 4| B=0.45T|
+|808|23:47| HV=600 PMT 0 1 2, HV=0 PMT 3 4| B=0.45T, card 1 2 3 are connected with attenuators|
+|809-814| 23:59|HV=600 PMT 0 1 2, HV=0 PMT 3 4| B=0, scan in time reveals that t=0 is the best -->anticipate trigger|
+|816-821| 24:10|HV=600 PMT 0 1 2, HV=0 PMT 3 4| B=0, scan in time: best timing dt = 100 ns|
+|822|24:27|HV=550 V PMT 0, HV=600 PMT 1 2, HV=0 PMT 3 4| B=0|
+|823|24:30|HV=550 V PMT 0, HV=600 PMT 1 2, HV=0 PMT 3 4| B=0|
+|824|24:37|HV=500 V PMT 0, HV=600 PMT 1 2, HV=0 PMT 3 4| B=0|
+|825|24:37|HV=OFF| B=0|
+|826|24:41|HV=900 PMT 0 1 2| B=0|
+|827|24:45|HV=900 PMT 0 1 2, dt=0| B=0|
+=== July 12th 2012 ===
+Investigated noise problem. Disappears by using screened cable for DY12
+|Run | time | run conditions | comments |
+| 829|13:29 |hv 800 ch 0,1,2 |B=0 |
+| 830|13:32 |hv 900 ch 0,1,2 |B=0 |
+| 831|13:35 |hv 800 ch 0,1,2 | B=0 magnete flame in|
+| 832|14:10   |hv 500 ch 0,1,2 | B=0 magnete flame in remove attenuators|
+| 833|14:15   |hv 600 ch 0,1,2 | B=0 magnete flame in remove attenuators|
+| 834-852|15:33   |hv 600 ch 0-4 | trigger problems|
+| 853-858|16:40   |hv 600 ch 0-4 | time scan|
+| 859-870|16:45   |hv 500 ch 0-4 | time scan|
+| 871-872|17:30   |HV scan to equalize| establish that HV={580,550,500,480,480}. Found that last two cables are swapped |
+| 873 | B>0| turn on magnet. Hv default.| Elettroni deviati!!!|
+| 874 | B>0 | magnet ON. HV default |  costanti di calibrazione Offline C=(1.2,1,1.5,1.1,1.4)|
+| 875 | B>0 | HV def | Collimatore: 2 blocchetti 5 cm Pb dopo la finestra con 2 mm separazione: 40 mrad * 100 cm --> dx=4 cm |
+| 876 | B=0 | HV def  | Collimatore; B ramping down? |
+| 877 | B=0 | HV def  | Collimatore |
+| 878 | B=0 | HV def  | Collimatore |
+| 879 | B=0 | HV def  | Collimatore chiuso; scambiati canali 3 e 4 che erano invertiti; C=(1.2,1,1.5,1.4,1.1) |
+| 882 | B=0 | HV def  | Collimatore chiuso |
+| 883 | B=0 | HV def  | Collimatore chiuso; Flame Magnet IN; Use for Ped File |
+| 884 | B=0 | HV def  | Collimatore aperto 2mm; Flame Magnet OUT; usb problem at the end|
+| 885 | B=0 | HV def  | Collimatore aperto 2mm; Flame Magnet OUT|
+| 886 | B=0 | HV def  | Collimatore aperto 1cm; Flame Magnet OUT|
+| 887 | B=0.5 T | HV def  | Collimatore aperto 1cm; Flame Magnet OUT|
+=== July 13th 2012 ===
+Debug of spectrometer trigger. Problems with upper part of logic unit, replaced with lower part. Dual timer removed, veto implemented with Stanford D signal set to 500 mus. Delay and width of trigger button revised, set to 500 mus. Missing alignment with photocatode.
+=== July 18th 2012 ===
+Pedestal studies
+| 896 | 12:21| HV off| Only maroc 0 board+cable; no laser|
+| 897 | 12:26| HV off| Only maroc 0 board+cable; no laser| RMS 12 cts |
+| 899 | 12:26| HV off| Only maroc 0 board no cable; no laser; improved trigger cable| RMS 1.5 cts |
+Giulietto Felici works on electronics to improve grounding and box.
+=== July 25th 2012 ===
+test electronics with new shielding
+| 900 | 10:37| pedestals| 5cards but no cables; RMS 1-2 ADC|
+| 901 | 10:40| pedestals| 5cards cable #0 in; HV off; RMS ~6 for first 43 channels, 10-18 for the others |
+| 902 | 10:44| pedestals| 5cards cable #0 in; HV=900V; RMS ~6 for first 43 channels, 10-18 for the others |
+| 903 | 10:52| LED run| 5cards cable #0 in; HV=900V |
+| 904 | 14:26| pedestals| 5cards all cables in; HV=0V |
+| 905 | 14:29| pedestals| 5cards all cables in; HV=default |
+| 905 | 14:29| pedestals| 5cards all cables in; HV=default -- high stat |