Difference between revisions of "To-do list"

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'''To-do list (Things that are broken at UITF, or could be improved upon...)'''
 
'''To-do list (Things that are broken at UITF, or could be improved upon...)'''
  
−
#BPMs don’t report the same orbit in tune mode and CW.  And BPMs report beam when there is no beam. It’s possible there’s just too much 1497 MHz rf inside the enclosure.  Can the stripline BPMs look for a harmonic of 1497 MHz?  Hopefully, they can be made to work, but I fear striplines and expensive receivers where the wrong choice (older SEE antenna-style bpms might have been better, after all, they work at CEBAF when RF is ON)  
+
General:
−
BCM outputs (we have cavities, need receivers)  
+
#Add sufficient concrete shielding to raise deliverable current; validate with RCG Breakpoint measurements. (In progress with FML)
−
Laser power is very small.  OK for bulk GaAs and keV Mott, but not enough for a program with superlattice photocathodes  
+
#Update the Operational Restrictions page to reflect new RadCon shielding assessment.
−
Move the laser under the table inside the enclosure?  That’s what I would do, eliminate the fiber. Would need to work with SSG to maintain all the PSS hooks.  
+
#I am uncomfortable with the amount of lead stacked on the keV dump structure (If Cameron has a bit of time available, an 80/20 table maybe?)
−
Laser power drift (temp cycle of the room AC?), but the current lock can deal with this, so not actually a problem when beam arrives at a cup or dump.  Maybe a problem for Wastewater Treatment  
+
#Procure more UHV supplies (another set of them)
−
Install an insertable halfwave plate to flip the sign of the polarization   
+
#Boards that convert electrical to fiber and vice versa
−
Electron beam optics not presently good, there is beta mismatch across the booster
+
#Work table upstairs
−
The optics modeling program should tell us beam size and aspect ratio at each viewer, so we have something to work towards, quickly, empirically
+
#Label all elements with label maker in cave.
−
M703 harp doesn’t work
+
#Hilty Gas bottle rack
−
Need specialized lead-brick shielding at insertable cups
+
#Generic Experimental Templates for submission
−
Viewers were not always installed at useful Z locations, i.e., betatron phase advance.  What is a useful location? At a beam waist.  “Viewers at nodes, BPMs at anti-nodes”
+
#Continual quick reference updates
−
Mu-metal
+
#Procedure development:
−
Replace manual valve VMVM401 with fast valve
+
#*Cold Start-up
−
Remove Rogowski coil #2 from beamline  
+
#*Shut down
−
Did the Yao cavity get damaged during one of the bakeouts? Pull it and check it out 
+
#*Hot Standby / Daily Start-up
−
Move Faraday Cup 3 to downstream viewer cross?  Not adjacent to control room, that’s the point here, where radiation levels are problematic
+
#*Power outage response checklist
−
More concrete shielding! 
+
#Add Video camera inside cave - preferably through viewer system for flexibility. Additional I/O required?
−
Consolidate the locations of steering magnets? Put them where they need to be
+
 
−
Update the Operational Restrictions page to reflect RadCon shielding assessment, maybe I did this already?
+
 
−
I am uncomfortable with the amount of lead stacked on the keV dump structure
+
Diagnostics:
−
What was the point of putting BPMs on the elevated beamline?  Did we think they would see 1nA beam? I guess we just thought we would thread beam in tune mode up there….
+
#BPMs don’t report the same orbit in tune mode and CW & BPMs report beam when there is no beam: Too much 1497 MHz rf inside the enclosure? Can the stripline BPMs look for a harmonic of 1497 MHz?  Were strip lines / DR receivers right choice vs older SEE antenna-style bpms? (Musson studying behavior; RF shielding put into place upstairs)
−
Need a beam loss accounting system; MPS BCM cavity or PSS BCM but this is a much bigger project (can’t we just buy a system that Trent designed/built for SLAC, or duplicate it?)
+
#BCM outputs (we have cavities, need receivers) (IC/Keith working on this now...)
−
I need to learn how to use qsutility and set quads  
+
#Viewers were not always installed at useful Z locations, i.e., betatron phase advance.  What is a useful location?  At a beam waist.  “Viewers at nodes, BPMs at anti-nodes” (Need Model or Beta functions, which means model work need to happen first to validate...)
−
Need a supply of large haimson steering magnets on the shelf (five sets should arrive soon)  
+
#Cameras that can be line-synced, then we could use them to look for 60 Hz motion.
−
More UHV supplies, another set of them
+
#Ready for I-to-Vs
−
Polarity of magnets not all correct, and some H/V labels are incorrect
+
#Need a beam loss accounting system; MPS BCM cavity or PSS BCM but this is a much bigger project (can’t we just buy a system that Trent designed/built for SLAC, or duplicate it?)
−
For regions that get vented frequently, there should be flange mounted NEG pump
+
#A3 should be closer to booster in order to protect the booster and define the launch
−
The buncher heater control is primitive, just a local heater with feedback.  There is epics temperature readback, but no epics interface to the heater control.  
+
#Survey view screens which are already YAG, but inappropriately labelled and correct. Change over remaining screens as opportunities present.
−
Wouldn’t it be easier to use a 200 W solid state amp to drive the 2-cell?  Forward power today is only 40 W, the 2-cell is not meant to be driven hard.  
+
#Decouple viewer from FC2 upstream of booster, also add another corrector just upstream.
−
Complete microphonics assessment, install vibration isolation pads? 
+
#IHAM703 X/Y swapped
−
Microphonics diagnostics should be available when running beam, so that when problems are encountered, we can see immediately if there’s a correlation with microphonic vibrations. At the moment, we can only assess microphonics from inside the cave, when the beam is OFF  
+
#Current Monitor Screen: Fix dump labels; Add BCM
−
Better rf quality to 2-cell? 
+
#IYGM604 vibrating?? Loose turnbuckle?
−
Do the piezo tuners do anything?  Why not?  
+
 
−
I think the booster should have been a low Q design to make it more reliable.  I am not expert on this topic, but high Q is important for long linacs that present a large cryo burden. The booster does not pose a large cryo burden - we should have forgone Q for reliability.
+
 
−
Cameras that can be line-synced, then we could use them to look for 60 Hz motion.  
+
Gun/Laser (EGG):
−
Global Channel Access button doesn’t work, it would be nice to have
+
#Laser power is very small.  OK for bulk GaAs and keV Mott, but not enough for a program with superlattice photocathodes  
−
We have a Hot Check Out tool, but we don’t presently use it
+
#Move the laser under the table inside the enclosure?  Eliminate the fiber... work with SSG needed to maintain all the PSS hooks.  
−
Some epics screens were hastily prepared, copied from CEBAF.  Epics screens should be improved, streamlined  
+
#Laser power drift (temp cycle of the room AC?), but the current lock can deal with this, so not actually a problem when beam arrives at a cup or dump.  Maybe a problem for Wastewater Treatment  
−
UED remains a mystery to me, and from what I can tell, to most everyone else too, even people in software know little about it.  Who does what?  Whose responsibility is it to update UED? How does one actually do that? Maybe two people know the answers.
+
#Install an insertable halfwave plate to flip the sign of the polarization   
−
Probably need a beacon or locked door to the aisle way above UITF (where we store stuff), or at least verification from RadCon that it’s ok to access this space when running beam.  Or maybe it’s safe to go back there when running beam?  
+
#Photogun and keV beamline:
−
A3 should be closer to booster in order to protect the booster and define the launch
+
::*The photocathode lifetime at UITF is REALLY bad, the field emission at 200 kV certainly doesn’t help (is it the sole problem?).  So take apart gun polish electrode, krypton process until there’s NO measurable field emission 
−
Need a professional rapid access beacon/system at entry way to the enclosure  
+
::*Align the rest of the beamline
−
Closed circuit cameras inside the enclosure  
+
::*<s>Fix the chopper slit (Kurt Lesker says we just need a 50:1 gear box, I’ve ordered it)</s> STAC5 controller issue; S. Windham ordered new - A5 aperture controls on it at present.
−
Photogun and keV beamline:
+
::setup the chopper phases, use the chopper 
−
The photocathode lifetime at UITF is REALLY bad, the field emission at 200 kV certainly doesn’t help (is it the sole problem?).  So take apart gun polish electrode, krypton process until there’s NO measureable field emission 
+
::*At the chopper chamber, VIPK301 ion pump not energized, it is just spewing CH4 into beamline, replace it
−
Align the gun so that the cathode AND the anode are at normal incidence relative to the beamline and trajectory 
+
::*Add load lock to depo chamber (I have cross and manipulator)
−
Align the rest of the beamline 
+
::*Add Mott polarimeter on keV line 
−
Fix the chopper slit (Kurt Lesker says we just need a 50:1 gear box, I’ve ordered it)
+
::*A3 is in the wrong place, at least in terms of protecting the booster 
−
setup the chopper phases, use the chopper 
+
::*Beam appears far right at ITVK203A, beam appears far left at ITVK401, maybe the alignment of the beamline will help?   
−
at the chopper chamber, VIPK301 ion pump not energized, it is just spewing CH4 into beamline, replace it
+
::*Install vertical Wien 
−
Add load lock to depo chamber (I have cross and manipulator)
+
#BNC spigots for triggers: pockel cell and gun mode
−
Modify depo chamber to include new chemical sources 
+
 
−
Attempt to better align the mask 
+
Optics/CASA:
−
Polish the schneedle (is it aluminum? Should be steel, no silver plating required (in fact, it’s bad), polish the interior surface of all pucks)
+
#The optics modeling program should tell us beam size and aspect ratio at each viewer, so we have something to work towards, quickly, empirically
−
Add the polarimeter 
+
::*Electron beam optics not presently good, there is beta mismatch across the booster
−
A3 is in the wrong place, at least in terms of protecting the booster 
+
#Institutionalize use of qsutility to set quads (In progress)
−
Beam appears far right at ITVK203A, beam appears far left at ITVK401, maybe the alignment of the beamline will help? 
+
 
−
Install vertical Wien 
+
RF/LLRF:
−
We need a map of our network connections, what is the network layout now at UITF? Do all network connections go through the rack behind the laser room/control room.  Are they all owned by Accelerator Division.  I think we have a combination of IT and Accel network routers  
+
#Yao cavity damaged during one of the bake outs? Check in-situ 
−
Where are all the pc104s and how do we reset them?  
+
#Buncher heater control is primitive: local heater with feedback.  There is epics temperature readback, but no epics interface to the heater control.
−
Ready for ItoVs
+
#Wouldn’t it be easier to use a 200 W solid state amp to drive the 2-cell?  Forward power today is only 40 W, the 2-cell is not meant to be driven hard.  
−
BNC spigots for triggers: pockel cell and gun mode
+
#Microphonics diagnostics should be available when running beam, so that when problems are encountered, we can see immediately if there’s a correlation with microphonic vibrations. At the moment, we can only assess microphonics from inside the cave, when the beam is OFF  
−
Boards that convert electrical to fiber and vice versa
+
#Do the piezo tuners do anything?  Why not?  
−
Two more electronics racks upstairs, one for polarimeter, one for PSS BCM (C channel, 6” tall, 23” long)
+
#LLRF distribution map (frequencies etc.)
−
Work table upstairs
+
 
−
Shop vacuums in all locations!
+
DC Power:
 +
#Consolidate the locations of steering magnets? Put them where they need to be
 +
#Need a supply of large haimson steering magnets on the shelf (five sets should arrive soon)
 +
#Polarity of magnets not all correct, and some H/V labels are incorrect
 +
#Add corrector in front of Booster for Max
 +
#BdL in 15/45 degree bends in keV region a mystery. Gary updated field map. Reboot iocitfmag when convenient.
 +
#Steering magnet holders for big and small Haimsons.
 +
#Systematic Checks of magnet polarity.
 +
 
 +
Software:
 +
#MAC Access for Training purposes, so global doesn't have to be opened. (Requested from Bevins)
 +
#Some epics screens were hastily prepared, copied from CEBAF.  Epics screens should be improved, streamlined  
 +
 
 +
 
 +
SSG:
 +
#More Robust Rapid Access system?
 +
::*Probably need a beacon or locked door to the aisle way above UITF (where we store stuff), or at least verification from RadCon that it’s ok to access this space when running beam.  Or maybe it’s safe to go back there when running beam?  
 +
::*Need a professional rapid access beacon/system at entry way to the enclosure  
 +
::*Closed circuit cameras inside the enclosure  
 +
#SSI screens for existing installation
 +
 
 +
ACE:
 +
#We need a map of our network connections, what is the network layout now at UITF? Do all network connections go through the rack behind the laser room/control room.  Are they all owned by Accelerator Division.  I think we have a combination of IT and Accel network routers  
 +
#Where are all the pc104s and how do we reset them?
 +
#*Table top printer for control room
 +
#*<s>Replace central big screen monitor in control room (Property tag F1-8291)</s> (Done; excess bad monitor?)
 +
#*Replace left monitor on ITFL03 work station... aperiodic line of dead pixels down middle of screen. Maybe a digitizer issue.
 +
#*MCC Style Wall monitors
 +
#Power Strip, power supply cable, and 2 monitors for control room

Revision as of 17:14, 22 September 2021

To-do list (Things that are broken at UITF, or could be improved upon...)

General:

  1. Add sufficient concrete shielding to raise deliverable current; validate with RCG Breakpoint measurements. (In progress with FML)
  2. Update the Operational Restrictions page to reflect new RadCon shielding assessment.
  3. I am uncomfortable with the amount of lead stacked on the keV dump structure (If Cameron has a bit of time available, an 80/20 table maybe?)
  4. Procure more UHV supplies (another set of them)
  5. Boards that convert electrical to fiber and vice versa
  6. Work table upstairs
  7. Label all elements with label maker in cave.
  8. Hilty Gas bottle rack
  9. Generic Experimental Templates for submission
  10. Continual quick reference updates
  11. Procedure development:
    • Cold Start-up
    • Shut down
    • Hot Standby / Daily Start-up
    • Power outage response checklist
  12. Add Video camera inside cave - preferably through viewer system for flexibility. Additional I/O required?


Diagnostics:

  1. BPMs don’t report the same orbit in tune mode and CW & BPMs report beam when there is no beam: Too much 1497 MHz rf inside the enclosure? Can the stripline BPMs look for a harmonic of 1497 MHz? Were strip lines / DR receivers right choice vs older SEE antenna-style bpms? (Musson studying behavior; RF shielding put into place upstairs)
  2. BCM outputs (we have cavities, need receivers) (IC/Keith working on this now...)
  3. Viewers were not always installed at useful Z locations, i.e., betatron phase advance. What is a useful location? At a beam waist. “Viewers at nodes, BPMs at anti-nodes” (Need Model or Beta functions, which means model work need to happen first to validate...)
  4. Cameras that can be line-synced, then we could use them to look for 60 Hz motion.
  5. Ready for I-to-Vs
  6. Need a beam loss accounting system; MPS BCM cavity or PSS BCM but this is a much bigger project (can’t we just buy a system that Trent designed/built for SLAC, or duplicate it?)
  7. A3 should be closer to booster in order to protect the booster and define the launch
  8. Survey view screens which are already YAG, but inappropriately labelled and correct. Change over remaining screens as opportunities present.
  9. Decouple viewer from FC2 upstream of booster, also add another corrector just upstream.
  10. IHAM703 X/Y swapped
  11. Current Monitor Screen: Fix dump labels; Add BCM
  12. IYGM604 vibrating?? Loose turnbuckle?


Gun/Laser (EGG):

  1. Laser power is very small. OK for bulk GaAs and keV Mott, but not enough for a program with superlattice photocathodes
  2. Move the laser under the table inside the enclosure? Eliminate the fiber... work with SSG needed to maintain all the PSS hooks.
  3. Laser power drift (temp cycle of the room AC?), but the current lock can deal with this, so not actually a problem when beam arrives at a cup or dump. Maybe a problem for Wastewater Treatment
  4. Install an insertable halfwave plate to flip the sign of the polarization
  5. Photogun and keV beamline:
  • The photocathode lifetime at UITF is REALLY bad, the field emission at 200 kV certainly doesn’t help (is it the sole problem?). So take apart gun polish electrode, krypton process until there’s NO measurable field emission
  • Align the rest of the beamline
  • Fix the chopper slit (Kurt Lesker says we just need a 50:1 gear box, I’ve ordered it) STAC5 controller issue; S. Windham ordered new - A5 aperture controls on it at present.
setup the chopper phases, use the chopper
  • At the chopper chamber, VIPK301 ion pump not energized, it is just spewing CH4 into beamline, replace it
  • Add load lock to depo chamber (I have cross and manipulator)
  • Add Mott polarimeter on keV line
  • A3 is in the wrong place, at least in terms of protecting the booster
  • Beam appears far right at ITVK203A, beam appears far left at ITVK401, maybe the alignment of the beamline will help?
  • Install vertical Wien
  1. BNC spigots for triggers: pockel cell and gun mode

Optics/CASA:

  1. The optics modeling program should tell us beam size and aspect ratio at each viewer, so we have something to work towards, quickly, empirically
  • Electron beam optics not presently good, there is beta mismatch across the booster
  1. Institutionalize use of qsutility to set quads (In progress)

RF/LLRF:

  1. Yao cavity damaged during one of the bake outs? Check in-situ
  2. Buncher heater control is primitive: local heater with feedback. There is epics temperature readback, but no epics interface to the heater control.
  3. Wouldn’t it be easier to use a 200 W solid state amp to drive the 2-cell? Forward power today is only 40 W, the 2-cell is not meant to be driven hard.
  4. Microphonics diagnostics should be available when running beam, so that when problems are encountered, we can see immediately if there’s a correlation with microphonic vibrations. At the moment, we can only assess microphonics from inside the cave, when the beam is OFF
  5. Do the piezo tuners do anything? Why not?
  6. LLRF distribution map (frequencies etc.)

DC Power:

  1. Consolidate the locations of steering magnets? Put them where they need to be
  2. Need a supply of large haimson steering magnets on the shelf (five sets should arrive soon)
  3. Polarity of magnets not all correct, and some H/V labels are incorrect
  4. Add corrector in front of Booster for Max
  5. BdL in 15/45 degree bends in keV region a mystery. Gary updated field map. Reboot iocitfmag when convenient.
  6. Steering magnet holders for big and small Haimsons.
  7. Systematic Checks of magnet polarity.

Software:

  1. MAC Access for Training purposes, so global doesn't have to be opened. (Requested from Bevins)
  2. Some epics screens were hastily prepared, copied from CEBAF. Epics screens should be improved, streamlined


SSG:

  1. More Robust Rapid Access system?
  • Probably need a beacon or locked door to the aisle way above UITF (where we store stuff), or at least verification from RadCon that it’s ok to access this space when running beam. Or maybe it’s safe to go back there when running beam?
  • Need a professional rapid access beacon/system at entry way to the enclosure
  • Closed circuit cameras inside the enclosure
  1. SSI screens for existing installation

ACE:

  1. We need a map of our network connections, what is the network layout now at UITF? Do all network connections go through the rack behind the laser room/control room. Are they all owned by Accelerator Division. I think we have a combination of IT and Accel network routers
  2. Where are all the pc104s and how do we reset them?
    • Table top printer for control room
    • Replace central big screen monitor in control room (Property tag F1-8291) (Done; excess bad monitor?)
    • Replace left monitor on ITFL03 work station... aperiodic line of dead pixels down middle of screen. Maybe a digitizer issue.
    • MCC Style Wall monitors
  3. Power Strip, power supply cable, and 2 monitors for control room
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