VME crate with CAEN digitizers was rebooted.

Run 46 started, number 15_Ge and number 5 anticompton dedector working now.

Beam tuning was made, focusing significantly improved.

Intensity:

beam dump: 0.9-1 nA,

collimator: 0.5 nA.

Rates:

RU =  8.2 MB/s

LF =   4.03 MB/s

EAGLE det4: 2.2 kHz

Since we were observing jumps of 16 ns in timings of all channels of whole boards, the assumption was that the 
signals from logical FIFO arrive at different times to S-IN inputs to zero the TS counters.
6 originally placed cables of quite the same length were replaced with 6 cables of declared 3-ns length, same 
producer, borrowed from NW's equipment.

the beam comes back at 20:54

the beam is now good focused

the daq resolved at 23:15

start new run: run 54

neda_psdcaen_positions.txt had weird values for three first detectors, especially neda_02.

It was:
NEDA_00_position_psdcaen    0
NEDA_01_position_psdcaen    0.22
NEDA_02_position_psdcaen    40

I (AF) make it:
NEDA_00_position_psdcaen    0.2
NEDA_01_position_psdcaen    0.2
NEDA_02_position_psdcaen    0.2

To be filled in, with affiliation and email.

Presumably, for later publication purposes.
 

Alphabetically by family name, please.

Budak, Mustafa Guray - Gazi University, mbudak@gazi.edu.tr

Ciemała, Michał - IFJ PAN, Kraków, Poland - Michal.Ciemala@ifj.edu.pl

Deary, James, - University of West of Scotland - james.deary@uws.ac.uk

Fijałkowska, Aleksandra,  aleksandra.fijalkowska@fuw.edu.pl

Fransen' Christoph IKP JOELN  fransen@ikp.uni-koeln.de

Goasduff, Alain - INFN-LNL alain.goasduff@lnl.infn.it

Grębosz, Jurek - IFJ PAN, Kraków, Poland

Jaworski, Grzegorz - HIL UW, Poland - tatrofil@slcj.uw.edu.pl

O'Donnell, David - University of West of Scotland - david.odonnell@uws.ac.uk

Palacz, Marcin - HIL UW, Poland - palacz@slcj.uw.edu.pl

Piętka, Iwona - Faculty of Physics, UW - iz.pietka@student.uw.edu.pl

Poklepa, Wiktor - UW, Poland, w.poklepa@student.uw.edu.pl

Saygi, Bahadir - Ankara University, Turkey - bahadir.saygi@ankara.edu.tr

Solak, Krzysztof - UW Poland, krzysztof.solak@post.pl

Szlęzak, Klara - UW, Poland, k.szlezak@student.uw.edu.pl

Temiz, Omer Sefa - Ankara University, Turkey - omer.temiz.95@gmail.com

White, Dylan, - University of West of Scotland - dylan.white@uws.ac.uk

Support of Target = 1.5 mg/cm2 Ta
Target            = 1.0 mg/cm2 Cd-106
Stopper           = 10 mg/cm2 Au
Beam Dump         = ~60 mg/cm2 Au

Off set of the plunger ~60 um

Distcal file   distcal01_vac

https://docs.google.com/spreadsheets/d/1e2homI9RCYrg369z8aaY3VMIPgapUPOv0zKISsl58vQ/edit?usp=sharing

The data from google sheet obtained 14:17 07/03/23

Plunger Run :

Micrometer :

Supposed Distance:

Position :

Beam energy measured:  148.2 MeV
Mind that this may be an overestimate (by ~1-2 MeV)

Run 26 is going on but not much for the moment in terms of any useful data.

And half of the EAGLE is opened.

20:50 EAGLE closed.

Offset of the plunger is 60 um.

new distcal01_vac_after_opening

Run 35 stopped. An attempt to check if we can get 5 MeV  higher beam energy.

Ge rates increasing, similar to what it was 24h before. Asking to decrease beam intensity by a factor of 2.

Attached Ge spectra before decreasing.
 

Before decreas beam current was 1.75enA, afterwards 1.1enA.

See pictures in the attachment:

1) stopper seen from the back (upstream view)

2) stopper  seen from the front (downstream view)

Mind the two small off-center dots. It is clear that the beam hits the edge of the frame.  This is possible because the 5 mm collimator has two small dots outside the 5 mm hole (the collimator  can be seen in the beam tube).

3) old target, upstream view

4)  new target, upstream view, after the stopper drove into it

5) new target, before it was mounted

6) the stopper, after the collision with the target. One of the visible rings is probably due to this collision, other traces probably reflect its complicated history earlier.