Proton Improvement Plan Bob Zwaska August 3, 2015 All-Experimenters Meeting.
-
Upload
julie-merritt -
Category
Documents
-
view
216 -
download
2
Transcript of Proton Improvement Plan Bob Zwaska August 3, 2015 All-Experimenters Meeting.
Proton Improvement Plan
Bob Zwaska
August 3, 2015
All-Experimenters Meeting
20150803Bob Zwaska | PIP2
PIP – Approaching Four Years
• Started officially Oct. 1, 2011– Upgrade Linac & Booster for NOvA, BNB, & Muon experiments– More than double flux, rep rate, run for the long-term
• Much has been done, several milestones achieved recently– Booster pulsed @ 15 Hz – 17 refurbished cavities– Beam was on nearly at 15 Hz– Record beam flux achieved
• Several major tasks to complete – Shutdown now– Cavity refurbishment – Bias Supplies– Klystron Delivery– Linac Modulators – New Cavities– Number of small items
20150803Bob Zwaska | PIP3
• Increase the beam repetition rate from the present ~7.5 Hz to 15 Hz– Need at least 9 Hz for NOvA 12-batch slip-stacking– Requires RF cavities refurbishment, RF Systems– Eliminate major reliability vulnerabilities and maintain
reliability at present levels (>85%) at the full repetition rate• Eliminate major obsolescence issues• Increase the proton source throughput, with a goal of reaching
>2E17 protons/hour– Presently operating at <1E17 protons/hour
• Ensure a useful operating life of the proton source through at least 2025 (now extended to 2030 to accommodate PIP-II schedule)
Proton Improvement Plan Goals and Scope (Established in 2011)
20150803Bob Zwaska | PIP4
Proton Improvement PlanBill Pellico
Bob Zwaska, DeputyKenneth Domann, Project Controls
Valeri Lebedev, Senior Physicist
LinacFernanda G. Garcia
200 MHz RF Power System
Fernanda G. Garcia
High-Level RF J. Steimel
Linac ModulatorTrevor Butler
7835 Procurement Fernanda G. Garcia
Accelerator PhysicsValeri Lebedev
Simulations & StudiesValery Kapin
Linac Notch CreationDave Johnson
InstrumentationCraig Drennan
Beam Position Monitors
Nathan Eddy
UtilitiesMatthew Gardner
Power DistributionRyan Crawford
Vacuum SystemDave Augustine
Low-Cond. Water System
Matt Gardner
BoosterKeith Gollwitzer
RFJohn Reid
Anode SupplyRyan Crawford
Bias SupplyPat Sheahan
Cavity Test StandPat Sheahan
Cavity & Tuner Refurb.Matt Slabaugh
New TunersMatt Slabaugh
New CavitiesC. Y. Tan
Cavity 1013Matt Slabaugh
John Reid
Accelerator PhysicsBob Zwaska
Simulation & StudiesBob Zwaska
Alignment & Aperture
Kiyomi Seiya
Booster NotcherSalah Chaurize
Booster CoggingKiyomi Seiya
Booster CollimationValeri Kapin
Radiation ShieldingKeith Gollwitzer
InstrumentationCraig Drennan
Beam Position Monitors
Nathan Eddy
DampersNathan Eddy
UtilitiesTodd Sullivan
Low-Conductivity Water SystemDavid Hixson
Power DistributionRyan Crawford
Vacuum SystemDave Augustine
Solid State UpgradeJohn Reid
Power AmplifierSteve Kotz
Driver ModuleTom Kubicki
ModulatorRene Padilla
InstallationRene PadillaSteve Kotz
RFQ InjectorC. Y. Tan
PIP Organization Chart, Version 1.6
Completed
FY15
PIP has 32 Tasks (New Cavity being split) 16 are completed and closed 6 more tasks will be closed in FY15
PIP – Task Structure and Status
Being split into three parts to better align with PIP II
Completion of all cavities likely into early FY16
20150803Bob Zwaska | PIP5
15 Hz Achieved!
• 17 Refurbished cavity allowed true 15 Hz pulsing– Beam on nearly all cycles – record running of > 1.4E17 / hr.
20150803Bob Zwaska | PIP6
15 Hz Results
• First attempt in May found weak cavitites
• Second attempt worked well for an extended period
• Known areas heated up– Only a few areas to be fixed
RF #17 BiasBus Bar
~ 96 cBeing fixed over shutdown
20150803Bob Zwaska | PIP7
20150803Bob Zwaska | PIP8
200 MHz RF Power SystemsLinac High Level
• Prototype 200 MHz Klystron– Well into assembly of klystron
• Bake of system expected this month• Plan testing at vendor
– Able to do full power & pulse length– Will not require Fermi to build test stand
• Complete late this year
Action Date
Preliminary Design Review 4/2/2014
Critical Design Review 7/11/2014
Seal in Drawings Complete 10/6/2014
Final Assembly Drawings Complete
12/17/2014
Seal in Assembly Complete 6/17/2015
Final Dress Complete 7/15/2015
Testing Complete 8/26/2015
Customer Source Inspection 8/27/2015
Package and Ship 9/8/2015
Gun outer weld cylinder
inner cathode supportCou
rtes
y of
CP
I
20150803Bob Zwaska | PIP9
• Replace present system• Was original to Linac• Power-hungry and failure-prone
• 28 cell design for lower voltage testing• Can run test station and Station 1
• Learning/ feed-forward control system design• Achieved stable operation with feed-forward and learning
simultaneously• Need to make future tests with changes in learning and feed
forward algorithm to reset to default conditions, and then run beam study tests
• Numerous beam studies to validate circuits
• Proceeding with 54 cell design• Most parts ordered for building 54 cell design, some have already
arrived• Will start assembly of the extra cells after testing of the 28 cell
modulator, then will order the cell enclosure and support structure
• Full system can proceed when all protypes tested
• Expected later this year
200 MHz RF Power SystemsLinac Modulator
20150803Bob Zwaska | PIP10
PIP Accelerator PhysicsLinac Laser Notcher
Linac Notch Creation • Substantially reduce losses (~30%) in Booster by neutralizing beam in Linac• Complex laser system nearing completion (with numerous interlocks/controls)• Upgrade cavity this summer (prototype running since last shutdown)
– Proof of principle neutralization last winter
• Plan to commission in fall
Mirror
Laser Input Port
RFQ
200 MHz Bunched Beam
20150803Bob Zwaska | PIP11
Booster Anode Supplies
• Anodes supplies for the Booster RF– A lot of effort to finish this system in time
• Issues finding vendors that can meet the specifications (today’s standards)• Issues with enclosure
– Full system test of the first anode is in process– Second supply built mostly in serial
• Installation to occur this shutdown– Complicated installations– Anode supplies are large/heavy
• Rigging/cranes needs to be coordinated
– Substantial electrical work• High-voltage / high-current cables
– Shakedown before beam returns
20150803Bob Zwaska | PIP12
Cap Bank & Bleeders
Anodes & Transformer for testing
Water Cooled Resistors
20150803Bob Zwaska | PIP13
New Cavities
Main RF Cavities• Additional Cavities 21 & 22
– Additional voltage headroom– Improve RF manipulations– Ensure reliability– Develop expertise with
cavities
• New Cavities– Long term operations– Avoid known weak points of
existing cavities– Higher current operations
• Compatible with PIP-II+ requirements
Harmonic Cavity– Perpendicular biasing– Improve injection
• Design simulations– Exploration of direct liquid
cooling– Different garnet geometries– Exploring “radial field”, an
alternate to a solenoidal field
• Work on testing garnets– Better measurements of
losses in AL400– Testing of AL800 to begin
soon
20150803Bob Zwaska | PIP14
Summary
• Much has been accomplished within PIP – 15 Hz• Still a busy shutdown
– Continue refurbishment (17/20 stations refurbished)• Embark on additional / new cavities
– Replace Booster Anode & Bias supplies– Install Linac Laser Notcher– Numerous other jobs (water, vacuum, instrumentation,
dampers)
• Commission rapidly out of the shutdown– At least 19 cavities – higher beam fluxes– Should be able to support 700 kW beam fully + BNB Ops
• Long-term, complete RF replacement towards PIP-II
Proton Improvement Plan
Bob Zwaska
July 6, 2015
All-Experimenters Meeting