proton driver at fermilab keith gollwitzer accelerator division fermilab ids-nf 7 th plenary meeting...
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Proton Driver at Fermilab
Keith Gollwitzer
Accelerator Division
Fermilab
IDS-NF 7th Plenary Meeting Oct 17-19,2011
Project X Review/Intro
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 2
Project X Review/Intro
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 3
Front End (warm)H- ion source, RFQ, MEBT, Programmable Chopper System
Initially 5mA
Programmable Chopper
Capable of bunch by bunch 162.5MHz
Will suppress beam to limit beam current down stream to
1mA average
Project X Review/Intro
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 4
3 GeV CW SRF LinacAverage beam current 1mA
325 and 650MHz
Project X Review/Intro
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 5
Splitters
Pulsed Dipole to switch from 3GeV experiment area and Pulsed Linac
Transverse RF beam splitter synchronized with programmable chopper
Project X Review/Intro
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 6
Pulsed Linac
1.3GHz SRF3-8 GeV
5% duty factor at 10Hz
Project X Review/Intro
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 7
Recycler/Main Injector/Beam LinesUpgrades to handle increase beam power
Stripping H- and accumulation of protons at 8GeV
Gollwitzer -- 7th IDS-NF Meeting 8
Project X Summary
• CW Linac will support average beam current of 1 mA to 3 GeV
• Pulsed Linac (3-8 GeV) will have a ~5% duty factor
• Possible 8 GeV beam power of 320 kW
• Programmable Chopper System (part of H- source) will provide appropriate bunch structure for the linac experiments as well as fill the appropriate part of the RF buckets in the accumulating Recycler Ring
October 18, 2011
Gollwitzer -- 7th IDS-NF Meeting 9October 18, 2011
Chopping and Splitting
Average
Gollwitzer -- 7th IDS-NF Meeting 10October 18, 2011
Fine Chopping
Average
Gollwitzer -- 7th IDS-NF Meeting 11
Neutrino Factory• Upgrade Project X
– 4 MW at 8 GeV• Increase particles per linac bunch• Increase pulsed linac duty factor
• Repackage linac beam for ~60 Hz delivery– Accumulator Ring
• Collect linac beam into bunches
– Compressor Ring• Narrow bunches to <= 3 ns
– Single Bunch Transfer/Extraction
October 18, 2011
Neutrino Factory Layout
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 12
Accumulator Ring
Compressor Ring
4MW Target
????
??
Gollwitzer -- 7th IDS-NF Meeting 13
Task Force• Fermilab Management established a group to
identify the upgrade path from Project X and look into feasibility of providing the desired 4MW beam
• Agreed on Project X upgrade numbers– Increase to 5 mA average current– Increase pulse linac duty factor to 10%
• Outlined options/limitations– Striping– Accumulator and Compressor Rings
• Discussing instability limitation for rings
October 18, 2011
Project X Upgrade Neutrino Factory
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 14
Front End (warm)H- ion source, RFQ, MEBT, Programmable Chopper System
Initially 5mARun at 10mA (Ion source is capable)
Programmable Chopper
Capable of bunch by bunch 162.5MHz
Will suppress beam to limit beam current down stream to
5mA 1mA average
Entire front end is being
designed for 10mA
Project X Upgrade Neutrino Factory
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 15
3 GeV CW SRF LinacAverage beam current 1mA 5mA
325 and 650MHz
Retuning of couplers to be efficientMay set initially for higher current
Project X Upgrade Neutrino Factory
October 18, 2011 Gollwitzer -- 7th IDS-NF Meeting 16
Pulsed Linac
1.3GHz SRF3-8 GeV
10% 5% duty factor at 10Hz 15HzMore RF power
Upgrade of couplersMore cryo capicity
Gollwitzer -- 7th IDS-NF Meeting 17
Rings’ Concepts• Simple numbers to start
– Trev ~ 800 ns
– frf ~ 10 MHz
– h = 8– Injection scheme
• ~50 ns beam ON followed by ~50 ns NO beam
• Evolution of design – Increase of circumference (~300m)– Space for RF and Injection/Extraction components– Concerns
• Injection: Stripping • Instabilities• Beam size in Compressor after bunch rotation
– Several designs and will settle on oneOctober 18, 2011
Gollwitzer -- 7th IDS-NF Meeting 18
Costing?• Fermilab engineering resources are busy• A little work has been done for Project X
upgrades – Project X has been doing lots of costing
exercises
• Rings (& new beam lines – inc. Final Focus)– Need to settle on lattice– Get count for components, cables, power
supplies, RF ....
October 18, 2011
Gollwitzer -- 7th IDS-NF Meeting 19
Plan• Set rings and beam lines lattice• Studies of instabilities• Write Task Force report on feasibility• Move onto costing
October 18, 2011