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S160 Shift Crew Manual

Version 0.1

Contents

  1. What are in the counting house?
  2. What to watch during the run?
  3. How to stop the current run?
  4. How to change target?
  5. How to start a new run?
  6. How to change tapes?
  7. Electronic Logbook (or run status news)

What are in the counting house?

Item

Click on the picture to enlarge

S160 console,
FRS console and
Other things to watch
HV console
Seetram scale factor
Trigger box
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What to watch during the run?

Item

Click on the picture to enlarge

FRS console The bottom left of the FRS console. STATUS and AUSFALL must be normally selected. The icons on the right hand side show the FRS elements which are turned off. If magnets trip, for example, they will show up here (RED and Flashing). 
HV console Check frequently that all Chamber HV channels are alive.  When chambers trip, I-Trped will be shown at the right colum.æ Note there are two pages, page 1 and page 2.  Use N(ext) and P(revious) keys to switch between the pages. 
SIS beam intensity On the tektronix scope, watch the SIS beam intensity.æ Under normal running condition, the reading should be around 2 Volts: 1.5 V is about 1 x 1011/spill. 
Magnet From the S160 console, type
PAW>magnet
This shows the time variation of four FRS dipoles. Vertical lines in each panel indicate midnight. 
CH2 peak position From the S160 console, type
PAW>ch2
This shows the run number vs CH2 calibration peak position. 
PB206 status From the S160 console, type
PAW>pb206
This shows the cummulative pb206 spectrum. 
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How to stop the current run?

Under normal running conditions,  terminate the 206Pb runs after about 3 hours.  CH2 target runs require about 10 minutes (1500-2000 counts in histogram No.807).  Do the following to stop the current run.
1. close file on the tape. On the E7_12 console, type
E7_12 > close
E7_12 > sho acq
...

Look at the status printed, and see how much data have been written on tape so far.  The absolute maximum number of bytes written onto tape is about 10 GBytes, but it is advised to change tapes after about 2-3 GBytes to secure our data.  The tape changing procedure is described elsewhere.

2. STOP beam. Press the red button.
3. save the current histograms on disk
In the example shown, default values were accepted except for the target number.
On the S160 console, where the analysis PAW is running, type
PAW> save_gs
.....
last run number was 222
run number ? (<CR>=223) 
 target number ? (if JUNK, type j) (<CR>=71) 47
seetram in/out ? (<CR>=out)
tape number ? (<CR>=12)
 filename : r71_223.hbo
 target   : 47
 seetram  : out
 tape     : 12
Is this OK ? [y/n] (<CR>=y)
4. Complete the run sheet. Enter stop time, and add remarks if any.
4. reset "global section" On the S160 console, where the analysis PAW is running, type
PAW> greset 0

Occasionally, PAW crashes when you do this, but don't panic.  In such a case, restart paw, and do "greset 0" again.

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How to change target?

Remember: the 206Pb target in use is target number 71, and the CH2 target we normally use for calibration is number 47.
 
1. Make sure that the beam is off.  Do it again!
2. "Eingabe" Usually, "status" display is selected on the FRS console.In this mode, target cannot be moved.  First click "Eingabe" on the left-most column, and also click "Ausfall" twice, both with the left button of the mouse. 
The screen should now look like this.
3. Activate "ET5" ET5 is our target holder. To activate it, first click around "TS11" on top of the console screen (see the right figure: the mouse cursor is now near "TS11").
Now, "ET5" icon should appear at the bottom of the screen.  Click this icon. A new window for target selection should pop up on the screen. 
4. Choose your target Scroll through the target list, and click on the line where the desired target is shown. The selected line becomes highlited.  Then hit the "Uebername" button.  This activates the target motor status/control window. 
5. Wait for the target drive motor to stop. Shown here is the target motor status/control window. wait until the motors (both horizontal and vertical) have stopped, and the target position indicators show the correct coordinates. When you confirm this, you can dismiss the two windows by clicking on the "ENDE" button. 
6. Restore the "status" display. It is always a good idea to restore the "status" display. Clock on the "Status" button and "Alle" button to do this.
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How to start a new run?

1. Check everything is OK.
  1. correct target?
  2. trigger condition OK? (#2/256 + #4 for production runs)
  3. chamber HV not tripped?
  4. seetram counter out?
  5. magnets not tripped?
  6. tape remaining space OK?
  7. was the global section (save_gs) of the previous run saved?
2. Beam on Push the "green" button.
3. open a new file on tape On the E7_12 console, type, for example (for run 206),

E7_12 > open file r71_206

4. make sure the global section is already reset If not, just reset it again.
5. Log the FRS status Go to the FRS status console, and type in (for run 206, for example)

SUC: GOOSY>@status 206

6. Run sheet!!! this is quite obvious
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How to change tapes?

 
1. Dismount tape On the E7_12 console, type

E7_12 > dism tape

Press "Unload Button" and wait until a green light is lit on the front panel of the tape drive. 
Then, take out the tape, and WRITE PROTECT it. The red write-protect indicator should be visible on the front of the tape cartridge.

2. Put on a label on a new tape Always use a NEW!!! tape, and don't forget to put on a label.  The label should be securely pasted on the tape cartridge, with a clearly written tape number.
3. Initialize the new tape, and mount it. Insert the new tape in the drive. On the E7_12 console, type, for example (assume the new tape label is r71_13)

E7_12 > init tape r71_13

This may take a while.  When the "E7_12" prompt comes back,  mount the tape 

E7_12 > mount tape

The tape is now ready to use.

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Electronic logbook

From the S160 console ( "PAW" prompt ), type news.  An example follows:
PAW> news
 Enter a news string (single line). Time stamp will be automatically added.
News? (<CR>=) Beam off due to ion source trouble. Recovery time unknown.
whenever something significant happens (machine trouble, beam off, run condition change, etc.). This command will prompt you to enter a single line message.  This message will be stored in a file called news.dat with a time stamp.  This file is accessible from the web.

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