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