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Proton Improvement Plan Bob Zwaska September 9, 2013 All-Experimenters Meeting.

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Presentation on theme: "Proton Improvement Plan Bob Zwaska September 9, 2013 All-Experimenters Meeting."— Presentation transcript:

1 Proton Improvement Plan Bob Zwaska September 9, 2013 All-Experimenters Meeting

2 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 2 Basics Linac and Booster are now running  Being tuned for HEP  Some PIP improvements being realized Major PIP work continues  Preparing major items for future downtimes / shutdowns Cavities, vacuum, transformers, power supplies…  Studies in Linac & Booster Balancing time:  No longer have to compete with shutdown for resources  Now have to compete with operations

3 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 3 Operating Status Booster is providing beam for NuMI. Typical numbers:  3 Hz beam  ~ 2.5e12 protons / pulse  ~ 2.5e15 protons / hour Present loss levels would accommodate > 6 x throughput Study periods have occasionally higher beam rates and intensities:  NTF (Linac)  Booster Studies Limited mostly by Main Injector  Lower rep rate because there is no slip stacking  Lower intensity until MI conditions

4 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 4 Linac Items Linac Hatch installed  Allow removal and installation of material into lower-level  Chief need is to put in new house-power transformer Next shutdown Progress on LEL Power supplies and amplifiers  Test cells of Marx generator for high-current, high- voltage pulses  Plans for klystron replacements of amplifier tubes Prototype in the works

5 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 5 Cavity Refurbishment Refurbishment is the limiting task in getting the Booster to 15 Hz Booster has 17/19 cavities in place with two out for refurbishment  This will continue throughout the next few years Next refurbished cavity to be installed this week  Cavity to be removed was the first- refurbished cavity which is leaking RF  This will continue throughout the next few years PIP anticipates more technicians now that the shutdown is over  These persons have not become available yet, even though the machines are operating now Also need to build new tuners with new ferrites  Issues with ferrite vendors and designs Cavity (RF17) preparing to repair flanges Cones and new cooling loops

6 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 6 Refurbishment Projections Have had to rework some of the first-refurbished cavities  Process is improving – hopefully accelerating  Expect more perturbation as operations exercises cavities to higher rates

7 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 7 -0.004 -0.002 0 0.002 0.004 1414.51515.51616.51717.518 Loss reduction: Booster Aperture  Magnet moves  Scans  Location: Long 16 Vertical Move  Fourth magnet move  Ready for a fifth  Plan several more as time allows Tunnel Location m

8 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 8 Loss Control: Booster Notching A “notch” of beam is removed from the Booster near injection to allow the risetime of the extraction With the previous scheme, at 15 Hz we would be putting 300 W of losses into the Booster from the notch alone  This loss was localized in a few gradient magnets PIP has a 3-stage approach to eliminating the losses from the notch 1.Modify the notcher arrangement in the Booster Relocated loss into a dump 2.Cog with the corrector magnets instead of RF phasing Under test now 3.Make most of the notch in the Linac Loss at 750 keV instead Gap

9 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 9 New Absorber & Kickers Relocate notch location from a series of kickers into a well- designed dump  Old extraction area to Main Ring Capable of absorbing 300 W of notching  Booster loss budget is 525 W New notcher has been operating since startup this year Future improvements: shorter kickers for cleaner pulses Beam direction

10 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 10 Laser Notcher Neutralize a portion of the Linac beam with a pulsed laser  Remove the majority of the loss from the Booster entirely Prototype of the laser front- end is operating  Atypical laser Multiple timescales High-pulse power Moderate average power (few W)  Final gain stages being specified Prototype of interaction region built with 3-D printer  Looking into collaborative production and testing of the final chamber

11 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 11 -0.004 -0.002 0 0.002 0.004 1414.51515.51616.51717.518 Booster Aperture  Magnet moves  Scans  Location: Long 16 Vertical Move  Fourth magnet move  Ready for a fifth  Plan several more as time allows Tunnel Location m

12 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 12 Summary Proton Source is operating  Operations are at a moderate level of intensity with low losses  Some PIP improvements in place  High-power beam awaits MI conditioning –or – Recycler slip stacking – or – Booster Neutrino Beam Work continues alongside operations  Refurbishment is the limiter to reaching 15 Hz operation Critically need labor to support the refurbishment effort and coordination of various groups (also operations again) Other systems also need replacement – but not time-critical yet  Studies in progress to reduce and control losses  Major upgrades still in the work to ensure long-term viability of the Proton Source

13 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 13 Proton Improvement Plan Bob Zwaska September 9, 2013 All-Experimenters Meeting

14 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 14 Proton Improvement Plan Projection NOvA Shutdown g-2 Mu2e 8 GeV 120 GeV LBNE William Pellico, Fermilab PMG, Aug 21 2013 14 MiniBooNE Maybe

15 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 15 Booster - Historical Performance Recent Modifications: Booster Collimators FY04 Booster Low Level/Damping FY04 New Booster Injection Line FY FY06 Removal of L13 Extraction Region FY07 Linac Quad PS FY07 Linac Low Energy Low Level FY08 New Ramped Correctors FY09 Annual E19

16 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 16 The Proton Improvement Plan should enable Linac/Booster operation capable of  Delivering 2.25E17 protons/hour (at 15 Hz) in 2016 while  Maintaining Linac/Booster availability > 85%, and  Maintaining residual activation at acceptable levels and also ensuring a useful operating life of the proton source through 2025. The scope of the Proton Improvement Plan includes  Upgrading (or replacing) components to increase the Booster repetition rate  Replacing components that have (or will have) poor reliability  Replacing components that are (or will soon become) obsolete  Implementing improvements or operational changes to reduce beam loss  Studying beam dynamics to diagnose performance limitations Several significant activities are well underway Goals for the Proton Improvement Plan

17 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 17 Booster 15 Hz Synchrotron Resonant Gradient Magnets Tunable RF Cavities 400 MeV to 8 GeV Beam Input MI-8 8 GeV

18 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 18 Proton Improvement Plan Development Proton Task Force (PTF) FY10  Initial effort to understand Proton Source Concerns  Focused on reliability and modernization Proton Improvement Plan Workshop – Jan 2011  Review of PTF  Review of additional issues associated with flux Management Structure – 2011 Summer  Established project team and ground rules Planning Structure – 2011 Fall  Managers established for all subprojects Resource Loaded Schedule 2011 Winter  Bottoms-up estimation of all subprojects Detailed Project Organization – 2012 January  Project Management Plan  Project Design handbook  Accounting codes & signature authority

19 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 19 References A Plan for Delivery of 8-GeV Protons through 2025, Beams- doc-3781, http://beamdocs.fnal.gov/ADpublic/DocDB/ShowDocument? docid=3781 http://beamdocs.fnal.gov/ADpublic/DocDB/ShowDocument? docid=3781 Proton Source Task Force Report, Beams-doc-3660, http://beamdocs.fnal.gov/ADpublic/DocDB/ShowDocument? docid=3660 http://beamdocs.fnal.gov/ADpublic/DocDB/ShowDocument? docid=3660 Proton Source December 2010 Workshop, http://beamdocs.fnal.gov/ADpublic/DocDB/DisplayMeeting? conferenceid=114 http://beamdocs.fnal.gov/ADpublic/DocDB/DisplayMeeting? conferenceid=114 PIP Home Page: http://www- ad.fnal.gov/proton/PIP/PIP_index.htmlhttp://www- ad.fnal.gov/proton/PIP/PIP_index.html

20 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 20 Booster Losses Losses at injection  Poorly captured beam Notch creation  Gap for extraction  Created with a kicker  Lost in gradient magnet Slow losses at high-energy  Optics issues  RF variation Transition  Occasionally significant, but can usually be tuned away

21 Sept. 9, 2013 Bob Zwaska All-Experimenters Meeting 21 Path to Higher Proton Throughput Loss reduction  Lower linac emittance RFQ & linac lattice improvements  Apertures & alignment Comprehensive survey of apertures Alignment where necessary (including within girders) Opening apertures where possible  Optics adjustment Comprehensive survey of lattice and coupling Control of tunes and chromaticity Automated orbit and optics smoothing  RF improvements Increased voltage from amplifiers Cavity modification/replacements  Instabilities Dampers  Injection painting Orbit Control  Magnetic Cogging Prerequisite for other work Loss Control  Rework of notching in Booster Perform earlier in cycle New notch kickers and absorber Exploration of full or partial notching in Linac  Collimation system Operate as true, two-stage system Run beam near primary scatterer Optimize primary scatter thickness  Adjust radiation shielding where advantageous

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