Start: 14:32

Stop: 14:37

Source: 137Cs

Comments: Detectors show small drifts, of the order of the precision of the HV (we could apply 0.5 V corrections to align some of them, but I will not touch them now)

Dy16 looks quite off in the background measurement, but not with the Cs one !!!.

Calibrated spectra: Dy3 an An3 moved a little in the same direction, An12 looks also a little displaced.

Now I plan to measure some sources with AIDA in. It means that the sources will not be centered. The available distance from the oposite side to

the nose of AIDA is 16 cm.

Start: 15:15

Stop: 15:50

Lmd:  Cs137_source_AIDA_201905221515_069.dlt ..Cs137_source_AIDA_201905221515_070.dlt

Root: 201905221550_137Cs_with_Aida.root

Rates: 7.5 kHz (Dyn), 7.8 kHz (Anodes)

Comments: 137Cs source with AIDA in, Source CS401, 4763. The source is not centered. It is positioned (the center of the source) at 14.6 cm

from the beam side external edge of the frame (lower NaI numbers). The holder is touching the nose of AIDA.

The nose of AIDA is 16 cm from the external edge of the frame (down stream). In that position Si # 3 is at the center of the DTAS according to Tom.

We have to be very careful when AIDA is moved in. Some of the AIDA  flat connector cables are touching the connectors of our NaI cables.

Individual rates (kHz), remember the source is not at the center, so we expect assymetry in the counting rates):

Dy01 1.1                    An01  1.2

Dy02 0.35                  An02  0.36

Dy03 0.97                  An03  1.0

Dy04 0.34                  An04  0.36

Dy05 1.1                    An05  1.1

Dy06 0.4                    An06  0.41

Dy07 1.0                    An07  1.1

Dy08 0.37                  An08  0.37

Dy11 0.27                   An11  0.33

Dy12 0.15                   An12  0.16 

Dy13 0.25                   An13  0.28

Dy14 0.15                   An14  0.16

Dy15  0.28                  An15  0.33

Dy16 0.15                   An16  0.15

Dy17 0.25                   An17  0.31

Dy18 0.16                   An18  0.15

Start: 15:55

Stop: 16:55

Lmd: Background_AIDA_201905221555_071.dlt

Root: 201905221655_background_with_Aida.root

Rates: 1.7 kHz (Dyn), 1.9 kHz (Anodes)

Comments: Background with AIDA in

Individual rates (kHz), remember the source is not at the center, so we expect assymetry in the counting rates):

Dy01 0.07                    An01  0.12

Dy02 0.07                  An02  0.09

Dy03 0.07                  An03  0.11

Dy04 0.08                  An04  0.07

Dy05 0.11                    An05  0.11

Dy06 0.10                    An06  0.12*

Dy07 0.08                    An07  0.10

Dy08 0.10                  An08  0.08

Dy11 0.08                   An11  0.14

Dy12 0.08                   An12  0.09

Dy13 0.08                   An13  0.12

Dy14 0.10                   An14  0.10

Dy15  0.09                  An15  0.16

Dy16 0.10                   An16  0.10

Dy17 0.09                   An17  0.14

Dy18 0.11                   An18  0.10

Start: 17:00

Stop: 17:40

Lmd:  Co60_source_AIDA_201905221700_072.dlt ..Co60_source_AIDA_201905221700_074.dlt

Root: 201905221740_60co_with_Aida.root

Rates: 13.2 kHz (Dyn), 12.6 kHz (Anodes)

Comments: 60Co source with AIDA in, red box, CD 395 . The source is not centered. It is positioned (the center of the source) at 14.6 cm

from the beam side external edge of the frame (lower NaI numbers). The holder is touching the nose of AIDA.

The nose of AIDA is 16 cm from the external edge of the frame (down stream). In that position Si # 3 is at the center of the DTAS according to Tom.

We have to be very careful when AIDA is moved in. Some of the AIDA  flat connector cables are touching the connectors of our NaI cables.

Individual rates (kHz), remember the source is not at the center, so we expect assymetry in the counting rates):

Dy01 2.2                    An01  2.27

Dy02 0.88                  An02  0.91

Dy03 2.08                  An03  2.20

Dy04 0.87                  An04  0.86

Dy05 2.10                    An05  2.17

Dy06 0.90                    An06  0.89

Dy07 2.01                    An07  2.13

Dy08 0.93                  An08  0.93

Dy11 0.60                   An11  0.68

Dy12 0.36                   An12  0.33

Dy13 0.57                   An13  0.62

Dy14 0.35                   An14  0.33

Dy15  0.58                  An15  0.65

Dy16 0.35                   An16  0.33

Dy17 0.54                   An17  0.62

Dy18 0.32                  An18  0.31

Start: 17:46

Stop: 10:14 (next day)

Lmd: Background_AIDA_201905221746_075.dlt ..Background_AIDA_201905221746_081.dlt

Root: 201905231014_background_with_Aida.root

Rates: 1.6 kHz (Dyn), 1.8 kHz (Anodes)

Comments: Background with AIDA in

Individual rates at the end of the measurement (kHz), remember the source is not at the center, so we expect assymetry in the counting rates):

Dy01 0.08                   An01  0.12

Dy02 0.07                  An02  0.09

Dy03 0.08                  An03  0.11

Dy04 0.08                  An04  0.07

Dy05 0.12                   An05  0.11

Dy06 0.11                   An06  0.11

Dy07 0.08                    An07  0.10

Dy08 0.11                  An08  0.08

Dy11 0.09                   An11  0.14*

Dy12 0.08                   An12  0.09

Dy13 0.08                   An13  0.12

Dy14 0.10                   An14  0.11

Dy15  0.11                  An15  0.15

Dy16 0.12                   An16  0.11

Dy17 0.09                   An17  0.14

Dy18 0.09                   An18  0.10

Start: 10:48

Stop: 10:58

Root: 201905231058_137Cs_with_Aida.root

Comment: Aida in, source in the position as in the earlier entries. Just to check if there is any jump. No lmd, only root.

No large displacements. Det Dyn1 seems to have slightly larger statistics. The assymetry of the two sides is clear, as it should be.

The Ba source of the red box is too strong. We can not use it. I need to identify the other one, which does not appear to be in RIBF.

The counting rate was 74 kHz in the DTAS.

Following the instructions of CAEN, the SY2527 is working again. Some pushing, massaging appear to solve the situation

Some pictures after the background during the nigth. The front and back side looks asymetric. To be checked again with a 137Cs source.

AIDA is in. Root file is saved, after one night.

Root: 201905241444_background_with_Aida.root

The aluminium plate of 3 cm thickness arrived and the lead shielding was dismounted and mounted again. We left a narrower hole in it.

Special thanks to Tom, who helped with the hard physical work.

Start: 16:35

Stop: 17:30

Rates: 1.5 kHz (Dynodes), 1.8 kHz (Anodes)

Listmode: Background_201905241635_082.dlt ...Background_201905241635_086.dlt

Root: 201905241730_background.root

Start: 17:43

Stop: 18:51

Root: 201905241851_137Cs.root

Lmd:  137Cs_source_201905241744_087.dlt...137Cs_source_201905241744_094.dlt

Comments: AIDA out. The source is positioned 5 mm deeper than before from the holder side (the arm is 5 mm longer).

To check if the assymetry is reduced.

Start: 18:58

Stop: 20:20

Lmd:  60Co_source_201905241858_095.dlt ...60Co_source_201905241858_106.dlt

Root: 201905242020_60Co.root

Comments: AIDA out. The source is possitioned 5 mm deeper as in the earlier Cs measurement (same position as the earlier entry)

To check asymmetry effects

Start: 20:32

Stop: 10:05

Lmd: Background_201905242032_111.dlt ...Background_201905242032_114.dlt

removed the rest of the files. Ocupying too much space

Root: Background_201905242032_111.dlt (temporary) to play (until 21;11),

full: 2019052521005_background.root

Comment: all sources were taken back. Check for assymetry.

Start: 10:27

Stop: 11:31

Root: 201905251131_60co.root

Lmd: 60Co_source_201905251027_176.dlt ...60Co_source_201905251027_181.dlt

Comments: possitioned as the measurements of yesterday. 5 mm deeper than earlier.

Red box with the other sources inside BELEN, far away from the DTAS

A few detectors have moved, but for the moment I will not correct it.

Reference detector in channel 10. It is very noisy now. I changed the threshold from 1400 to 1600 but still noisy. It requires further attention

New Config file saved.

Start: 11:42

Stop: 14:45

Lmd: Background_201905251141_182.dlt ..Background_201905251141_186.dlt

Root: 201905251445_background.root

Comments: No sources around. All were taken back. Only doubful sources might be there, that I need to ask Nishimura san.

AIDA is out

Start: 14:53 (May 25)

Stop: 14: 37 (May 27)

Root: 201905271437_background.root

Comment: there is small assymetry between one side and the other. Probably it is determined by the closeness of the big wall in the direction of the beam

For the moment there are three channels connected.

Channel 5 is AIDA plastic,

Channel 10 is the anode of the Ref detector

Channel 16 is the pulser.

Small alignment corrections were needed, of the order of 0.5-1V.

All detectors were realigned

Start: 15:15

Stop: 15:31

Lmd: 137Cs_source_201905271514_187.dlt .. 137Cs_source_201905271514_195.dlt

Root: 201905271531_137Cs.root

Rates: 7.9 kHz (Dynodes), 7.9 kHz (Anodes)

Comments: Aida out, source in the center. As in earlier measurements 5 mm deeper.

Reference detector might require repositioning of the optical fiber. It appears too close to the Cs peak and it is very noisy.