| ID |
Date |
Author |
Category |
Subject |
|
43
|
Sat Mar 28 18:11:13 2020 |
Alex, Yuri | General | no beam in the ESR |
Yuri and Sergey (on phone) have investigated extensively the problem with having no beam in the ESR. The FRS has been checked and seems OK. The ESR is fine as well.
The problem seems to be the timing. Ths SIS and the ESR seem to be completely out of synchronization. The on-call service for the control system has been called. |
|
180
|
Tue Dec 8 15:47:07 2020 |
Jan | Detectors | manual preamp & shaper settings for CsISiPhos |
attached is a document showing fotos of all involved amplifiers in the chain to document the manual settings active during the experiment.
Summary:
Si-pad n-sides [MSI-8 (1)] were set to 5 GeV (expected E-deposition ~2 GeV)
Si-pad p-sides [MPR-32 (1 & 2)] were set to 1 GeV (expected E-deposition ~2 GeV)
DSSD channels [MSI-8 (2)] were set to 5 GeV (expected E-deposition ~1.2 GeV)
CsI channels [MSI-8 (2)] were set to 4 GeV (expected E-deposition 46 GeV)
It seems we got clipped signals from the Si-pad p-sides, because the MPR-32 were saturated due to a wrong gain setting.
This might explain, why there was not real influence on the spectra when adjusting MSCF settings for those channels.
I cannot comment on the CsI gain setting, because i don't know whether the given GeV-range by MesyTec directly applies for CsI & photodiode.
However, for DSSD and Si-pad n-sides the settings look okay. |
|
7
|
Tue Mar 12 12:54:58 2019 |
Chen, Sidhu | DAQ | how to start DAQ and plot histogram. |
1. login litv-exp account
rchen@lxg1254:/data.local2/2002_238UIMS$ ssh -X litv-exp@lxg0155.gsi.de
(don't login on lx-pool.)
litv-exp@lx-pool.gsi.de's password: ViValasVegas@****
2.login r4l-47 account
litv-exp@lxi087:~$ ssh r4l-47
litv-exp@r4l-47's password:ViValasVegas@****
3.start mbs
R4L-47 litv-exp > mbs
mbs>
mbs> -R4L-47 :msg_log :Message logger running
3.1 Initilizing, show, start and stop the acq
mbs> @startup
-R4L-47  ispatch :Task "m_util" not started!
mbs> @startup
-R4L-47 :util :task m_util started
-R4L-47 :util :setup file setup.usf successfully loaded
-R4L-47 :util :trigger module set up as MASTER, crate nr: 0
-R4L-47 :util :enabled interrupt
-R4L-47 :collector  ipe type 2 or 4: virtual mapping
-R4L-47 :transport :task m_transport started
-R4L-47 :read_meb ipe type 2 or 4: virtual mapping
-R4L-47 :transport :starting server in inclusive mode
-R4L-47 :transport :waiting for client (port 6000)
mbs> -R4L-47 :read_meb :task m_read_meb started
-R4L-47 :stream_serv:task m_stream_serv started
-R4L-47 :collector :task m_collector started
mbs> show acq
-R4L-47 ispatch :Task "m_util" not started!
mbs> show acq
-R4L-47 :util :--------------------------------------------------------------
-R4L-47 :util :ACQUISITION INITIALIZED 12-Mar-19 13:44:09: active tasks:
-R4L-47 :util :m_util m_transport m_daq_rate m_collector m_stream_serv
-R4L-47 :util :m_read_meb
-R4L-47 :util :SB setup LOADED from setup.usf.
-R4L-47 :util :Readout table NOT LOADED, acquisition STOPPED.
-R4L-47 :util :There are 32 streams with 32 buffers a 32768 each.
-R4L-47 :util :Current crate is 0, event builder is RIO4.
-R4L-47 :util :--------------------------------------------------------------
-R4L-47 :util :Crate 0: ID= 20, LOCAL SYNC SYNC , subevent slots=200000.
-R4L-47 :util : trig 1: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 2: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 3: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 4: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 5: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 6: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 7: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 8: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 9: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 10: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 11: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 12: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 13: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 14: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util : trig 15: cvt= 300, fclrt= 12 [usec], max se length=100000 b
-R4L-47 :util :--------------------------------------------------------------
-R4L-47 :util :Name of output device =
-R4L-47 :util :Tape label = , Dismounted, file CLOSED
-R4L-47 :util : 0.000 [MB] written to tape, 0.000 to file
-R4L-47 :util :--------------------------------------------------------------
-R4L-47 :util :Collected: 0.0000 MB, 0 Buffers, 0 Events.
-R4L-47 :util :Rate : 0 KB/s, 0 Buffers/s, 0 Events/s
-R4L-47 :util :--------------------------------------------------------------
mbs> start acq
mbs> stop acq
-R4L-47 :util :stop acquisition
mbs> -R4L-47 :collector :acquisition NOT running
-R4L-47 :read_meb :found trig type 15 == stop acquisition
4. plot the histogram
litv-exp@lxi087:~/2019Munich-Det/Go4-Muenchen-3V785AH-1V830-simple$ go4
Go4 v5.3.2, build with ROOT 6.12/06 and Qt 4.8.6
Using Qt settings at /u/litv-exp/.config/GSI/go4.conf (default)
 |
|
175
|
Thu Oct 1 22:20:03 2020 |
Jan | DAQ | final unpacker config |
We identified an issue with randomly missing adc channels in all lmd-files before run 0273.
This led to errors in the unpacking process.
This issue is solved with the new config and mapping for the unpacker.
The respective files are attached here.
The unpacker is ready to use in /u/litv-exp/unpacker/unpackexps/E121
The adc issue is also understood. We deactivated the internal adc thresholds during the experiment, because we encountered the very same unpacker errors. This solved the problem for all later runs, but we forgot to think about a solution for the earlier runs.
Mea culpa.
Jan |
|
176
|
Mon Nov 2 16:45:55 2020 |
Jan | DAQ | f_user & mbslog |
Attached is the f_user.c and the mbslog.l files.
The readout function is for the following setup:
3x ADC CAEN V785
1x SCA CAEN V830
1x TDC CAEN V1190
1x Vulom TRB5 (triggerbox)
1x Vulom4b PEV (priority encoder)
1x TRIVA7
1x RIO4 R4L-47 |
|
41
|
Sat Mar 28 16:12:25 2020 |
ruijiu, ragan | DAQ | enter ESR and turn on the HV crate. |
|
|
54
|
Sun Mar 29 14:29:13 2020 |
ruijiu | | e121_run_00240.lmd |
s6 positon at 50mm. |
|
112
|
Wed Apr 1 01:05:36 2020 |
ruijiu | Detectors | detector position fixed at 60 mm |
The detector cable was disconnected . We entered and reconnected the cable. |
|
58
|
Sun Mar 29 21:02:43 2020 |
ruijiu | Analysis | decay line of 205Tl beam |
decay line of 205Tl beam with Ar gas jet target on and S6 slit at -8mm
Ar gas density~1e12 atoms/cm2 |
|
182
|
Mon Mar 29 16:31:09 2021 |
Pierre-Michel | DAQ | cross section |
(1.393*^-8 + 3.18*^-13 + 4.707*^-8)/4.707*^-8 = 1.29595 |
|
146
|
Sat Apr 4 13:41:04 2020 |
Shahab | Runs | cooler down |
cooler is down. only one device is off GECEBG2T. updated now it is working. |
|
168
|
Mon Apr 6 14:57:04 2020 |
Shahab | Runs | cooler down |
cooler component GECEBG2T again had to be reset. |
|
16
|
Tue Feb 25 15:49:58 2020 |
ruijiu chen | DAQ | changing scaling factor. |
How to change scaling factor?
The parameters is in f_user.c file:
1. open the f_user.C with emacs :
R4L-47 litv-exp > emacs -nw f_user.c
2. change the parameters "MWPC_downscale".
#define MWPC_downscale 0 // reduction = 2**MWPC_downscale
3.compile the program.
4. restart mbs. |
|
53
|
Sun Mar 29 14:01:45 2020 |
ruijiu | | beam position on DSSD |
move the detector 1cm
outside.from 60mm to
70mm.
left direction is
outside. right direction
is
inside(close to beam).
the spot is moving from
left to right. |
|
39
|
Sat Mar 28 15:23:05 2020 |
Alex, Ragan, Mei Bai | General | beam lifetime measurement |
We see two species in the Schottky spectra during the beam lifetime measurement without the target. The one (probably the primiary beam) is significantly better cooled than the other.
So, we were wondering what is the other beam? Maybe the recombined ones? |
|
171
|
Thu Apr 9 11:47:28 2020 |
ruijiu | | backup data |
2020.4.8 12:00Started copying
data。
2020.4.9 11:52 Copied 6.3TB
data. The copy speed is 65-67MB/s.
2020.4.15 Bring the two USB hard disk to my office and connect them to lxg1298 computer.
Send email |
|
172
|
Fri Apr 17 18:27:34 2020 |
ruijiu | Analysis | backup data |
1.connect USB harddisk to computer lxg1254 and copy data to sever.
sync -rtmv --progress --checkSUD /media/sdgl/data/ litv-exp@sbk0l9:/lustre/ap/litv-exp/2020-
04-14 e121_rchen/NTCAP/hd1
2020.05.02 08:06 copied 11.88 TB to server. 1.8TB rest on hard disk. |
|
110
|
Tue Mar 31 23:31:41 2020 |
Shahab | Runs | alpha_p calibration |
Vc = 212849.9349
Ic = 0.2
1)
Vcc=6400
f= 245.314
Veff= 219218.2989884789
β= 0.7143483279777152
γ= 1.4289995125817443
2)
Vcc=6800
f=245.227
Veff= 219618.31558866
β= 0.7147234572628363
γ= 1.4297823255462372
3)
Vcc=6000
f=245.404
Veff= 218818.2823347592
β= 0.7139723840585469
γ= 1.4282166995124788
Taking 1) and 2):
η : 0.33044950273377705
αp1: 0.15925696358166558
αp2: 0.1587208769044816
Taking 1) and 3):
η : 0.34166460537796267
αp1: 0.14804186093747995
αp2: 0.14857882942379202
Taking 2) and 3):
η : 0.33653854822327256
αp1: 0.1526318314149861
αp2: 0.15370488657848214
αp average: 0.1534892081401479 |
|
157
|
Sun Apr 5 13:05:43 2020 |
Ragan, Shahab | Runs | Zero measurement (S2: 0/35 mm and S6: -20/7 mm) |
beam: 205Tl81+ (no scraping , Al ~1g/cm2)
energy: 400 MeV/u
storage time: 0 hr
S2: 0/35 mm
s6: -20/7
purpose: data with TARGET ON
Detector position (CsISiPHOS): out of the ring
Detector position (MWPC): -60 mm
run start at 19:02, run0343.lmd
file running: 0511.lmd
_______________________________________________________________________________
time when accumulation starts: 12:59
storage time at Manipulation 9 starts at: 13:
storage time at Manipulation 9 stops at: 14:
I cooler during storage at Manipulation 9: -1 mA (20 mA)
time spend at manipulation 13 : 5 mins
(i.e. time for which electron cooler is on after gas jet)
I_cooler = -1 mA (20 mA)
I_SIS: 1.8e9
ESR particles after stacking: e6 (offset 5e5)
Number of stackings: 100
Target ON density at SC 7 E 07: 4.11e12
Target on time for measurement: 10 mins (by event mode)
Target ON density at SC 12 E 12: 4.11e12
Target on time for measurement: 5 sec (by event mode)
NTCAp file:
SC_2020-04-04_19-04-52
\IQ_2020-04-04_19-04-52
IQ rate: 8 MS/s
(saved in drive : O)
copy and repeat the above (below the line) for every storage time measurement |
|
122
|
Thu Apr 2 21:03:40 2020 |
Ragan, Yuri, Sergey, Nikos | Runs | Zero hour measurement (S2:-10/35 mm) |
beam: 205Tl81+ (no scraping, Al ~1g/cm2)
energy: 400 MeV/u
storage time: zero hrs
S2:-10/35 mm
purpose: data with TARGET ON
Detector position (CsISiPHOS): out of the ring
Detector position (MWPC): -60 mm
run start at 19:05 , first file: run0292.lmd (File was started when stacking was ongoing. Maybe not all the stackings could be sen in the analysis.)
file running: 0292.lmd
_______________________________________________________________________________
time when accumulation starts: --
time when storage starts: 19:10
time when storage ends: 19:10
I_cooler during storage time: --
I_cooler = 177 mA
I_SIS: 2.2e9
ESR particles after stacking: 3.5e6 (offset 1e5)
Number of stackings: ~40 (can be checked on NTCap data)
Target ON density: 3.45e12
Target on time for measurement: 10 mins (by event mode)
NTCAp file:
SC_2020-04-02_19-10-21
\IQ_2020-04-02_19-10-14
IQ rate: 8 MS/s
(saved in drive : p)
copy and repeat the above (below the line) for every storage time measurement |