HT of upstream AIDA from iseg, HT cable shielded, 100V, 17 uA. HT of downstream AIDA from CAEN, AIDA#0. Both channel 0 and 1 of CAEN are on, even though there is just one channel connected. DEGAS platform closed. The crates of BB7 and bplast have been put to the ground of the AIDA's structure (cupper sheet)

Attachment 1: TEST1: BB7 fully connected = 2 tiles of BB7 have been connected to the mesytec preamps. BB7 is not biased. The mesytec preamps have been fully connected and supplied but 6/8 black cables are not connected on the other side. 4X and 4Y are connected to the 2 FEBEX cards. The cables of BB7 right between the snout and the preamps are shielded.

AIDA05.1.8L --> FWHM 76-80 channels

Attachment 2: TEST2: BB7 fully disconnected

AIDA05.1.8L --> FWHM 71 channels

Attachment 3: TEST3: BB7 fully disconnected, TAMEX crate unbiased, BB7 NIM crate turned off

AIDA05.1.8L --> FWHM 67 channels

Attachment 4: AIDA01.1.0 --> FWHM 171 channels --> same detector, also biased with iseg but bad results

HT cable shielded, HT of upstream AIDA from iseg, HT of downstream AIDA from CAEN. Both channel 0 and 1 of CAEN are on, even though there is just one channel connected. During this test, some parallele tests are being done on BB7 Mesytec. In general, middle tile: detector disconnected from preamps but preamps connected on the other side.  Right tile: detector connected to preamps, cable shielded but preamps disconnected on the other side (supplied, one output is plugged). Those conditions may have changed during the test. The BB7 and bplast crates are also being connected to the cupper sheet of AIDA's structure to be grounded, the carton pieces under the crates have been removed.

AIDA05 connected, HT 0V

Attachment 1: AIDA05.1.8L --> FWHM 1907 channels

Attachment 2: AIDA09.1.9L --> FWHM 1467 channels

AIDA05 connected, HT 100V

Attachment 3: AIDA05.1.8L --> FWHM 74 channels

Attachment 4: AIDA09.1.8L --> FWHM 79 channels

Attachment 5: AIDA13.1.8L --> FWHM 250 channels

AIDA05 disconnected, HT 0V (cable between the detector and the adaptor board)

Attachment 6: AIDA05.1.8L --> FWHM 16 channels

AIDA05 disconnected, HT 100V

Attachment 7: AIDA05.1.8L --> FWHM 16 channels

Attachment 8: AIDA09.1.8L --> FWHM 87 channels

Attachment 9: AIDA13.1.8L --> FWHM 234 channels

Attachment 10: AIDA12.1.8L --> FWHM 116 channels (bplast cable side disconnected) to be compared to 117 channels (screenshot forgotten to be saved but tags left 21600 and 21171) --> no effect

BB7 is still connected but not biased (same configuration as the previous elog). The channel of the CAEN power supply #0 is connected to ASIC08 and biased at 100V. The channel of the CAEN power supply #1 is disconnected but still biased at 100V. AIDA04 (chained to AIDA05) is biased via an unshielded cable to an iseg NHQ 246L power supplied, biased at 100 V with 15 uA.

All the outside drain wires of bplast are now taped to the snout.

The red markers of the cursors of the previous test have been left for ease of comparison.

Attachment 1: AIDA05.1.8L --> FWHM 67 channels

Attachment 2: AIDA05.1.1L --> FWHM 69 channels

Attachment 3: AIDA05.1.4L --> FWHM 79 channels

Attachment 4: AIDA05.1.12L --> FWHM 79 channels

Attachment 5: AIDA05.1.15L --> FWHM 79 channels

Attachment 6: AIDA13.1.8L --> FWHM 236 channels, chosen because same place than AIDA05 but for the dowstream detector that is still biased with the CAEN module

Attachment 7: AIDA12.1.8L --> FWHM 91 channels, chosen because same place than AIDA05 but of the bottom of upstream detector that is still biased with the iseg module

Attachment 8: AIDA16.1.8L --> FWHM 143 channels, chosen because same place than AIDA05 of the bottom of dowstream detector that is still biased with the CAEN module. This curve has 2 humps

BB7 is still connected but not biased (same configuration as the previous elog). The channel of the CAEN power supply #0 is connected to ASIC08 and biased at 100V. The channel of the CAEN power supply #1 is disconnected but still biased at 100V. AIDA04 (chained to AIDA05) is biased via a shielded cable to an iseg NHQ 246L power supplied, biased at 101 V with 16 uA.

All the outside drain wires of bplast are now taped to the snout.

Attachment 1: AIDA05.1.8L --> FWHM 60 channels

Attachment 2: AIDA05.1.1L --> FWHM 51 channels

Attachment 3: AIDA05.1.4L --> FWHM 57 channels

Attachment 4: AIDA05.1.12L --> FWHM 65 channels

Attachment 5: AIDA05.1.15L --> FWHM 69 channels

Attachment 6: AIDA13.1.8L --> FWHM 277 channels, chosen because same place than AIDA05 but for the dowstream detector that is still biased with the CAEN module

Attachment 7: AIDA12.1.8L --> FWHM 88 channels, chosen because same place than AIDA05 but of the bottom of upstream detector that is still biased with the iseg module

Attachment 8: AIDA16.1.8L --> FWHM 133 channels, chosen because same place than AIDA05 of the bottom of dowstream detector that is still biased with the CAEN module. This curve has 2 humps

Attachment1: AIDA05.1.8L when AIDA05 connected, biased at 101 V with shielded cables. BB7 is still connected but not biased (same configuration as the previous elog). The channel of the CAEN power supply #0 is connected to ASIC08 and biased at 100V. The channel of the CAEN power supply #1 is disconnected but still biased at 100V. AIDA04 (chained to AIDA05) is biased via a shielded cable to an iseg NHQ 246L power supplied, biased at 101 V with 16 uA.

All the outside drain wires of bplast are now taped to the snout.

The red markers of the cursors of the previous test have been left for ease of comparison.

FWHM: 21699-21644 = 55 channels (to be compared with the previous elogs between 73 channels and 79 channels)

Conclusion: a significant improvement can be observed with a cleaner power supply.

Attachment1: AIDA05.1.8L when AIDA05 connected, biased at 100 V with not-shielded cables, after the DEGAS platform has been closed, the 2 tiles of BB7 have been connected to the mesytec preamps. BB7 is not biased. The mesytec preamps have been fully connected and supplied but 6/8 black cables are not connected on the other side. 4X and 4Y are connected to the 2 FEBEX cards.

The 2 drain wires of bplast that were hanging on the bottom are now taped to the snout, not making any antena effect anymore.

FWHM: 79 channels (to be compared with the previous elogs between 73 channels and 76 channels)

Conclusion: no significant differences can be observed when BB7 is connected. The tail on the left side of the spectrum in twice as small, most likely because on the now-taped drain wires of bplast

Attachment1: AIDA05.1.8L when AIDA05 connected, biased at 100 V with not-shielded cables, CAEN HT,  after the base of the snout (screws) has been connected to the ground via cupper sheets

FWHM: 76 channels (to be compared with the 2 previous elogs 73 channels and 75 channels)

Conclusion: no differences can be observed.

Biased at 100, AIDA05 connected, HT cables not shielded CAEN HT

Attachment 1: AIDA05.1.8L --> FWHM 75 channels

Attachment 2: AIDA05.1.1L --> FWHM 70 channels; peak of the pulser shifted to the right (red lines on the left: cursor for the 1.8L)

Attachment 3: AIDA05.1.4L --> FWHM 85 channels; peak of the pulser completely shifted to the left (10 000 on the left)

Attachment 4: AIDA05.1.12L --> FWHM 78 channels

Attachment 5: AIDA05.1.15L --> FWHM 79 channels, peak the most shifted to the right of the 5 curves tested

This elog is the first reliable. Before, the histograms have not been zero'd

Each test are done and compared for AIDA05.1.8L, compared with the pulser (caracteristics, see attachment1)

Test 1: with HT cables shielded

Attachment 2: HT = 100V; cable AIDA05 connected --> FWHM = 77 channels (= 51.3 keV) with a top of the curve at 100 cts (AIDA9.1.8L has also been checked and was at 89 channels)

Attachment 3: HT = 0V; cable AIDA05 connected --> FWHM = 1757 channels with a top of the curve at 15 cts after almost 40 min because the noise had a baseline of 6500 channels

Attachment 4: HT = 0V; cable AIDA05 disconnected --> FWHM = 16 channels with a top of the curve at 110 cts

Attachment 5: HT = 100V; cable AIDA05 disconnected --> FWHM = 17 channels with a top of the curve at 110 cts

Test 2: with HT cables not shielded

Attachment 6: HT = 0V; cable AIDA05 connected --> FWHM = 1452 channels (968 keV) with a top of the curve at 23 cts after 1:15 hours because the noise had a baseline of 7000 channels

Attachment 7: HT = 100V; cable AIDA05 connected --> FWHM = 73 channels with a top of the curve at 100 cts

Attachment 8: HT = 0V; cable AIDA05 disconnected --> FWHM = 15 channels with a top of the curve at 120 cts

Attachment 9: HT = 100V; cable AIDA05 disconnected --> FWHM = 16 channels with a top of the curve at 125 cts

Conclusion: with shielded or unshielded cables, the noise situation seems to be the same, proving that mot of the noise don't come from the cables

Other thing that have been noticed is that the peak of the pulser is shifted when the cables are connected compared to when they are not connected: connected: peak at around channel 21675; disconnected: peak at around channel 21925

AIDA05 completely disconnected, all the others FEEs64 are fully connected

Attachment 1: aida05, FWHM= 95 ch, 63 keV

Attachment 2: aida15, FWHM= 108 ch, 74 keV

Test with shielded HV cables for both detectors.

The FWHM for ch1 is now 184 ch.

Yesterday cables for cards 5, 6, 10, 11, 12, 14, 16 were partially connected (only 1 out of 2 flat cables was in), now both are connected.

Status before grounding checks