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 300 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 300 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
      - If the 8 ports or more with Vfp = 0 appear exclusively 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  and call Silicon expert before proceeding to next step : 
        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 and call Silicon expert before proceeding to next step : 
          1- Click button on the bottom part of the
               screen on SiMon
          2- Wait 10 minutes before switching ON FEC Low Voltage Power Supplies
          3- In meantime you can ramp down Phobos magnet
          4- 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

• 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    
• DO NOT PERFORM THIS STEP IF THIS IS JUST FOR
  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 :  
  OR Follow the instructions for :  
• 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.