Embed Size (px)
Citation preview
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls
An overview of the status of each of the controls subsystems will be presented…
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – LLRF
Our goal for fast digitization:
14 bits (to get 12 effective bits) or 74 dB SINAD
119 MSPS with a minimum of 40 MSPS to meet bandwidth requirement of 20 MHz
There are chips that come close to this (esp. @ 40 MHz). Example is TI ADS5500 but it’s not yet available on an off-the-shelf VME board
customized board (or wait until on-the-shelf)
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – Diagnostics
Work is underway to set up a test area in FFTB and in buildings 407 and 406
What we have already:
Network switch in place in bldg 407
EVG/EVR on loan from SLS
Spare Linac stripline BPMs will be installed in FFTB
Spare WS will be installed in FFTB
Libera BPM control module purchase req in
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – Diagnostics
What we need to purchase:Libera BPM moduleControls cables will be installed between FFTB and bldg 406 (earliest Jan.05) VME crate with slot 0 controller
What we need to build:Ceramic BPM prototypes will be developedNeed PNET board to (intf: SLC MPG to EVG)
What we need to design and build:Bunch Length Monitoring (CSR/OTR/CTR)
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector Controls – Drive laser
Controls has had input into content of RFI, RFP and follow-up questions to 5 vendors
The specifications are:
VME arch is preferred
EPICS CA is comm protocol
500 msec response to commands
1 Hz update of all monitored values
RF pulse with 360 Hz fiducial is available
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector Controls – Drive laser
Vendors’ responses:
are light in detail;
none say they will use VME
where details are given, they indicate LabView on Windows XP speaking Channel Access protocol
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector Controls – Drive laser
What this means: Timestamps may not be synchronized at all pulse to pulseIt is unknown how they will synchronize when LCLS is running at a subharmonic of the clock - 120 Hz, 10 Hz, 1 HzWindows is another OS to maintain (upgrades, patches to perform, EPICS builds/debugging when things cease to work)Labview is another licensed s/w package to maintain
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – Timing
EVG 100 and EVR 100 on loan from SLS until end of Feb., 2005
Manufacturer estimates that EVG 200 and EVR 200 ready for market between Nov. 2004 and May 2005
This system still needs PNET board (see Stephanie Allison’s talk)
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – Vacuum
We have postponed vacuum activities to next calendar year
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – Power supplies
Kristi Luchini joins LCLS mid-October, focusing on this task
Evaluation of ESD design development (Dave McNair)
Testing and integration of SLS power supply system
Evaluation of Diamond Light Source implementation of SLS PS controllers with redundant power modules
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector Controls – PPS,MPS,BCS
PPS PLC prototyping in progress
Working towards a Citizen Review of a PLC-based PPS
MPS requirements being collected -
15 msec turn off time
Modal control pulse to pulse (integration with the EVG)
Two mitigation devices: drive laser and kicker magnet
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Injector/Linac Controls – Conventional Facilities
A/C Power – approved by mgmt to add in all 10 sectors
24 V Power – not yet added to all 10 sectors
Cabling – new safety requirements next March will specify “low-smoke, non-halogenated cable” that means additional cost
Cable Tray design in progress Data will be timestamped within 500 msec of beam pulse
Dayle Kotturi
Facility Advisory Committee Meeting [email protected]
October 12, 2004
Linac Controls – Conclusions
Timestamps and triggering may not be synchronized pulse to pulse in the injector drive laser (controls may need additional effort to be budgeted)Some uncertainty in date of availability of EVG/EVR timing boardsCabling costs will increase due to change in safety requirements next yearThere’s still lots to do and lots of risks we can minimize/eliminate by prototyping!
