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DESCRIPTION

Energy dependence of total fission cross section in 181Ta (1, 0.5, 0.3 A GeV) +1H

This experiment is a part of an experimental campaign dedicated to high-precision measurements of spallation residue production. In this experiment, energy dependence of the total fission cross section in the reaction 181Ta+1H will be measured. The accuracy aimed to is below 10 %. The energy dependence is very important due to the energy loss of the proton beam in the spallation neutron source and due to the importance of secondary reactions initiated by particles emitted in the primary reactions. Together with previously measured data in 208Pb+1H and 238U+1H (see here), these new data will allow a study on mass dependence of the spallation-fission process. They will also be mandatory, due to high accuracy, for benchmarking of theoretical models. This work is supported by the European Community under the FP6 Integrated Project EUROTRANS Contract no. FI6W-CT-2004-516520.

Participants

Technical Information

Shifts

GSI-FRS

PARTICIPANTS

List of participants

E. Casarejos

A. Kelic

D. Pérez

H. Álvarez

A. Boudard

J. Benlliure

Y. Ayyad

K. Kezzar

S. Leray

R. Pleskac

T. Enqvist

A. Bacquias

C. Paradela

D. Tarrío

V. Foehr

Shift Plan for S293 experiment


 Friday 27 Saturday 28 Sunday 29 Monday 30 Tuesday 1
24:00-6:00 Enrique
Yassid
Aleksandra
Yassid
Alain
Diego

1 GeV setting		 Enrique
Yassid
Alain
Khalid
Diego

1 GeV counting		 Enrique
Yassid
Alain
Khalid
Diego

300 MeV countingv		 Enrique
Yassid
Alain
Khalid
Diego

500 MeV setting (2h)
counting (7h)		 Enrique
Yassid
Alain
Khalid
Diego

500 MeV counting
6:00-15:00 Pepe
Hector
Carlos
Khalid

1 GeV setting
counting		 Pepe
Hector
Timo
Carlos

300 MeV setting (4h)
counting (4h)		 Pepe
Hector
Timo
Carlos

300 MeV counting		 Pepe
Hector
Carlos

500 MeV counting		 Ville
Hector
Carlos

500 MeV counting
15:00-24:00 Sylvie
David
Ville

1 GeV setting		 Sylvie
David
Aleksandra
Antoine
Ville

300 MeV counting		 Sylvie
David
Aleksandra
Antoine
Ville

300 MeV counting (4h)
500 MeV setting (2h)		 Sylvie
Aleksandra
Antoine
Ville

500 MeV counting

 

TECHNICAL INFO

Technical Information

Filesheet (PS)

Filelist (XLS)

Experimental Setup (Setup image)

FRS ion optics

Liquid H2 Target (Operation procedure) (Special procedure)

Data acquisition

FRS handling

  • Before starting (loading ion-optical files, starting different programs ??)
  • Setting the FRS (loading a reference setting and scaling)
  • Saving a setting
  • different programs  SD, DI, setting current grids, change the seetram sensitivity...etc...??)
    How to get the status of all devices in the beam line

SEETRAM calibration

TOOLS

 

MultiWire PCs HV values

Chamber Reference HV Final HV
MW 11 1.5-1.6 kV
MW 21 1.5-1.6 kV
MW 22 2.5 kV
MW 31 2.5 kV
MW 41 2.0 kV
MultiWire PCs Calibration Parameters
Chamber Slope Offset
MW 11 X 0.0696 3.07
MW 11 X 0.0696 0.0
MW 21 X 0.0732 0.4
MW 21 X 0.0732 0.0
MW 22 X 0.0732 2.2
MW 22 X 0.0732 0.0
MW 31 X 0.0732 -0.6
MW 31 X 0.0732 -7.1
MW 41 X 0.0732 -14.477
MW 41 X 0.0732 0.0
MW 42 X 0.0732 -5.893
MW 42 X 0.0732 0.0
Rising MBS

How to start the RISING MBS system from scratch:

 

  1. Note: before starting any MBS system please make sure, that no socket with port number 60xx or 6500 is in TIME WAIT, FIN_WAIT_1 or FIN_WAIT_2. Use command 'netstat | grep 6' on the LynxOS processors you want to use.
  2. MBS Help System:

    'help -mbs' on LynxOX - or MBS prompt lists all MBS commands

    Examples:

    'help start -mbs' ----- lists all commands with keyword start

    'help start ev -mbs' ----- show syntax of the command 'start event_serv'

    MBS commands have at least 1, but up to 3 keywords and optionally a list of parameters and flags.

    If not all keywords of a command are specified in the help call, a list of commands containing these keywords are displayed.

    Generally keywords can be abbreviated until they are unambiguous

  3. Desktop:1, name: Main DAQ Control

    VME processors: R3-8 (FRS), R3-27 (TPC), R3-9 (DGFs), R3-25 (TIME), R3-21 (silicon), R3-19 (USER).

    Event Builder: X86-8 or (X86-20)

    • login on X86-8 or 20 as user rising (with rsh)
    • cd ~/mbsrun/july_2008 //(alias s4)
    • resa (wait all the ports are cleared, use the 'netstat' comment until no more 'TIME_WAIT' from the r3-XX)
    • prm (wait for prompt)
    • @startup (acquisition will be started also with this procedure)
  4. Desktop 2:

    data logging with RFIO

    lxfs32 is the RFIO server prepared for RISING. The RAID5 disk systems connected and mounted on: /data_rising02

    The NFS exported directories are: /data_rising02/rising02

    and they are mounted as: /d/rising02

    The experiment uses: /d/rising02/jul_08/directory which contain calib, test and data subdirectories. Please avoid creating subdirectories if not needed.

    The RFIO implementation at GSI requires to open the file with full path(archive) name, and the path and the name of the file must together be not longer than 43 characters. Since the mount points are already quite long, the following logic links have been created on lxfs32: /rida02 -> /data_rising02/rising02

    on lxfs32: (upper right window on desktop 2)

    • login with ssh as user risrfio on lxfs32
    • check that no program named rawDispRFIOn is running. If yes, stop it
    • start rawDispRFIOn

    on the MBS, node name: x86-XX (8, 20..):

    • connect rfio lxfs32 -disk (only once or after point 4)
    • open file full_path_name_of_file_on_lxfs32 -rfio

      Examples:

      open file /rida02/jul_08/test/test1 -rfio

      open file /rida02/jul_08/test/test2 size=200 first=1 -auto -rfio

    • close file

      .. more file open and closes

    • disconnect rfio (end of data logging with rfio)
  5. Remote Event Servers

    Desktop: 2, name: File Server and Remote Event Server

    Remote event server shall run on lxg1018

    (upper left window on desktop 2:)

    • login on lxg1018 as rising
    • mrevserv X86-8 or 20 (before make sure that no other remote event server is running)
  6. Reinitialize the titris module

    In case the FRS crate has been switched off or there is a warning in cracow about Titris module having always the same timestamp one should start it again:

    • connect to the r3-8
    • s4
    • cd vme_frs
    • ts_mod_RIO3 -m
    • ts_mod_RIO3 -g
S293 Go4 On line analysis program

How to start the Go4 analysis program

 

  1. Login as profi into lxg1018 and go to the directory where go4 package is:

    /u/s184/s293/go4line/pro

  2. to start go4 type:

    go4

  3. Click on the button Launch an analysis
  4. In the Start client window set:
    • Operation mode: As client
    • Host: lxg1021 (This machine is the one dedicated to online)
    • Name: MyAnalysis
    • Check that the directory is /u/s184/s293/go4line/pro
    • Click on Start button
  5. In the Analysis configuration window set:
    • Event source: Remote Event Server
    • Name: lxg1018
    • Click on Submit+Start button
  6. In the right browser of the GUI double click on Analysis icon where you will find the standard Go4 folders

 

How to stop Go4 on line analysis program

 

  1. If you want to stop the online analysis click on the stop button
  2. If you want to close the online analysis click first stop and then click on disconect runing analysis

In case Go4 cannot connect to MBS

One possibility is that the remote server is not running ('ps -u rising | grep serv' to check) and reconnection is refused (Message:'-E rconnect (connect) Connection refused'). In such case, try to relaunch the DAQ:
  1. >close file (if not closed)
  2. >@shutdown
  3. >@startup
and then restart the remote event server

> mrevserv x86-8
Parameter List
Change of FRS setting
  1. Program SRMAG:
    go to MENU
    go to DATENSATZE
    go to SUCHKRIETERIEN if 1st loading and choose the reference file
    go to DATENSATZE LADEN to load it
    go to SAVE SETZEN
    go to MENU
  2. Choose the FRS section to be scaled (program MGSKAL)
    go to MENU
    go to AUSWAHL DER GRUPPE to choose the section
    choose the section !
  3. Scale the section (program MGSKAL)
    go to MENU
    go to SKALIEREN UND SETZEN
    go to SKALIEREN MIT FACTOR
    enter the scaling factor from LIESCHEN calculations
  4. goto number 3 until all FRS is scaled
  5. print the magnet status (program SD)
    click with the mouse on STATUS
    glue the magnet status on logbook
Save of FRS setting

Use program SRMAG:

 

  1. go to ABSPEICHERN (return)
  2. go to the line which describes your experiment (return)
  3. check there is no feller in the reading (return)
  4. type okay (Do)
  5. give a commentar on beam and beam line status
  6. give initials of people in shift
  7. give a SLUECHELWORT which will be the name used to call this setting
  8. type (Do) to save the data
  9. go to DATENSATZE

ANALYSIS INFO

MAIN RESULTS

 

Departamento de Física de Partículas Facultad de Física, Campus Vida s/n
Universidad de Santiago de Compostela E-15782 Santiago de Compostela, Spain
Tlf: +34 881811000 Fax: +34 981521091