Gerrit van Nieuwenhuizen and Rachid Nouicer
Procedure made by : August 17, 2001

    Shift Crew responsibility

• make sure that beams are stored and cogged for 15 minutes without major
  losses before ramping up silicon bias
• check radiation levels on chipmunks, should be less than 200 Microrad/Second.
  If not don't switch on silicon, call Expert

Notes :

• Most monitoring systems are slow or very slow, please be patient !
• Silicon FEC Low Voltage Power Supplies should be switched ON first, before ramping up the magnet to full field
• Silicon Bias Power should be ramped down and Silicon FEC Low Voltage Power Supplies ON before ramping down magnet.
• In case beam lost, magnet quenching, beam dump or power dip, stop run and ramp down bias.
• In case of emergency, stop run and then Click button on the bottom part
  of the screen on SiMon and call Silicon expert.

• During data taking, watch the beam conditions. Check that the blue and yellow beam intensities are not
  dropping and look for increasing radiation on the Chipmunks.

1 - Data taking for Stored and Cogged Beam (no Steering)

  :  say the following magic words :
            - we are happy about the collision rate (if the collision rate is reasonable)
            - ask MCR what their plans for this store are, will they steer the beam ?
            - if they want to do steering then don't ramp up the bias, wait until they have
               finished steering and call them again
            - tell them that you would like to switch on silicon and ask them if they expect the 
               conditions to be stable
            - ask MCR to alert PHOBOS 10 minutes before they dump the beam, so that we 
               can switch off the silicon
            - thank them for their efforts 
if FEC Low Voltage Power Supplies is already ON jump to Step 2. 
if FEC LOW Voltage Power Supplies is OFF follow instruction : 

if FEC Low Voltage Power Supplies is already on, use document "Magnet, General Information/Help"  for ramping the magnet.

• The Silicon FEC Low Voltage Power Supplies should be already ON, DAQ is running without writing and no Latchup.
• For Latchup see latchup section in this document.
• Check the radiation levels on the Chipmunks again, should be less than 200 Microrad/Second
  If not, don't switch on silicon, switch off FEC Low Voltage, call expert..
• Ramp up the Silicon Bias by clicking on the green button under the Bias Power Supplies Control on SiMon
• Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
• Wait until the Silicon Bias has ramped up and all indicators are green
• During the bias ramps, the Central Alarmer will go off, this is normal
• After the Silicon bias turned on, one FEC (FEC 27) will have latched up, and both the Latchup
  window on the <OnLatchup1> and the <OnlLatchup 2> client will turn red, and the <Central Alarmer > will sound
• Follow the instructions for below
• Stop the run on the DAQGui
• Enable writing to Disk
• Wait for 5 minutes after the Si bias has been ramped up to give the system time to stabilize
• Start a new run, reset scalers
• you are now taking data

2 -  End of the Store

1)  If dumping (or quenching) of store by RHIC  leads to the Latchup with the number 
      of ports with Vfp = 0 is less than or equal 8 : 
           1- Stop the run. Start a new one without writing.
           2- Click on the button   
           3- click on <Reset Latchup under the <SiExpert> menu on the DAQ gui. 
                <OnLtchup1 (after 40 seconds) >  and <OnLatchup2 (takes upto 2 minutes) 
                windows should be green
           4- Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
           5-Click on the Si hybrids on the portal and check Vfp (Vfp should not be 
               equal to 0) and if Vfp not equal to 0 latchup Reset was successfull. You are ready for next Store.
           6- If latchup persist Call Silicon Expert.

2)  If dumping (or quenching ) of  store by RHIC leads to the Latchup with 
       (Vfp =0) larger than 8 ports latched up :       
        1- Stop the run 
        2- Click on the button  and call Silicon Expert first.
      - If the 8 ports or more with Vfp = 0 appear in the FECs 17,18,19,20,21 and 22, 
            - click on the  button on the bottom part of the screen 
               on SiMon . 
            - follow instruction
     - If you have general latchup more than 8 ports with Vfp=0 including some 
         FECs from 17 to 22 : 
        2- Click button on the bottom part of the screen on SiMon
        3- Wait 10 minutes before switching ON FEC Low Voltage Power Supplies
        4 - In meantime you can ramp down Phobos magnet
        5 - follow instruction

• Stop the run
• Click on the button   
• Don't TURN OFF the Low Voltage Power Supplies.

  in case of power dip or storm (bad weather) or ...

• Stop the run
• Click button on the bottom part of the screen on SiMon

3 -  When Latchup happens, what should you do ?

• Initial state after ramping up the Silicon Bias
  - Click on the Si hybrids on the portal which should not be (old).
       - After ramping up the bias the following FEC ports will have latched up:
          FEC     Port
            27      0&1&2&3
           If more ports are latched up call a Silicon EXPERT
  -  Click on <Reset Latchup> under the <SiExpert> menu on the DAQ gui. 
  -  Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
       -  After 40 seconds, the <OnLatchup1> and <OnLatchup2 ( need 2 minutes)>  
           windows should be green . Click on the Si hybrids on the portal and check 
          Vfp (Vfp should not be equal to 0), otherwise call Silicon EXPERT

• If you have a latchup, as indicated by the <OnlLatchup1> or <OnLatchup2> display, you should:
       -  Stop the run. Start a new one without writing.
       -  Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
       -  Click on the Si hybrids on the portal which should not be (old).
       -  Record in the online logbook which, and how many, FEC/Ports have 
           Vfp = 0 (last column) :
            1 - If the number of ports with Vfp = 0 is less than or equal to 8,  
                  click on <Reset Latchup under the <SiExpert> menu on the DAQ gui. 
                  <OnLtchup1 (after 40 seconds) >  and <OnLatchup2 (takes 
                  upto 2 minutes) windows should be green
            2- If the number of ports with Vfp = 0 is larger than 8, call Silicon Expert
            - If the 8 ports or more with Vfp = 0 appear in the FECs 17,18,19,20,21 and 22, 
              - click on the  button on the bottom part of the screen 
                 on SiMon . 
              - follow instruction
       - If you have general latchup more than 8 ports with Vfp=0 including some 
           FECs from 17 to 22 : 
          2- Click button on the bottom part of the screen on SiMon
          3- Wait 10 minutes before switching ON FEC Low Voltage Power Supplies
          4 - In meantime you can ramp down Phobos magnet
          5 - follow instruction
  

• Initial state after switching on the silicon FEC Low Voltage Power Supplies
   - Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
  - Click on the Si hybrids on the portal which should not be (old)  
  - After switching on the silicon FEC Low Voltage Power Supplies,
           the following FEC ports will have latched up:
          FEC     Port
             9        2&3
            17         3
            18         3
            21       2&3
            27       2&3
           If more ports are latched up call a Silicon EXPERT
  -  Click on <Reset Latchup> under the <Expert> menu on the DAQ gui. 
  -  Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
  -  Click on the Si hybrids on the portal and check Vfp (Vfp should be not equal to 0)
       -  After 20 seconds, the <OnLatchup1> and <OnLatchup2 (need 2 minutes)>  windows should be green, otherwise call Silicon EXPERT

• Initial state after switching on the silicon FEC Low Voltage Power Supplies
   - Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
  - Click on the Si hybrids on the portal which should not be (old)  
  - After switching on the silicon FEC Low Voltage Power Supplies,
           the following FEC ports will have latched up:
          FEC     Port
            17         3
            18         3
            21       2&3
           If more ports are latched up call a Silicon EXPERT
  -  Click on <Reset Latchup> under the <Expert> menu on the DAQ gui. 
  -  Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
  -  Click on the Si hybrids on the portal and check Vfp (Vfp should be not equal to 0)
       -  After 20 seconds, the <OnLatchup1> and <OnLatchup2 (need 2 minutes)>  windows should be green, otherwise call Silicon EXPERT

if FEC Low Voltage Power Supplies is already ON jump to Step 3. 
              
if there is no steering and the beams are stable : 

• Kill DAQGui, if it is running, by doing the following:
        1)  stop the run, if it is active
        2)  click <Quit PHATDAQ> under <File> menu
        3)  type <control-C> in the RUN xterm    
• switch on the silicon FEC Low Voltage Power Supplies by doing the
  following (make sure lights in the tunnel are off) :
        1)  click green <ON> button in FEC PS Control on SiMon
        2)  all the status buttons should appear as <ok> and be green, with the
              exception of 2 red buttons under <OctVtx>  (this is normal and will go
              away in a few steps) . The alarmer will sound, this is normal.
• start up the DAQGui by clicking on the PhatDAQRunControl icon on the desktop. See also instructions for starting the DAQ.
• Wait until the DAQGui has appeared and the message "Ready to receive initialization parameters"
  has appeared in the <SiROC Messages> then you  must click on the <Init Silicon> item under the <Expert> menu
• Wait for the "waiting for CMD" message in the <SiROC Messages> window
• Disable Writing to Disk
• Set runtype to AllBeam 
• Start a run
• Click on the      icon on the menu bar at the bottom of the screen 
  on Online Monitoring 3, this will restart all online clients
• Follow the instructions for : above
• Follow the instructions for : above
• The 2 red buttons on SiMon under <OctVtx> should turn green within 20 seconds
• Click on <Restart ROCDB> under the <SiExpert> menu on the DAQ gui.
• The <OnlLatchup1> client on the Online Monitoring #3 computer  should also become green in 30 seconds
• The <OnlLatchup2> client on the Online Monitoring #3 computer  should also become green after few minutes
• If either the <OnLatchup1> or the <OnlLatchup2> client becomes red,  or the <OnlLatchup1> client alarm goes off on the <Central Alarmer>,
  (make sure they are running), call Silicon EXPERT.