Proton Driver at Fermilab Keith Gollwitzer Accelerator Division Fermilab IDS-NF 7 th Plenary Meeting Oct 17-19,2011

Project X Review/Intro October 18, 2011Gollwitzer -- 7th IDS-NF Meeting2

Project X Review/Intro October 18, 2011Gollwitzer -- 7th IDS-NF Meeting3 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, 2011Gollwitzer -- 7th IDS-NF Meeting4 3 GeV CW SRF Linac Average beam current 1mA 325 and 650MHz

Project X Review/Intro October 18, 2011Gollwitzer -- 7th IDS-NF Meeting5 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, 2011Gollwitzer -- 7th IDS-NF Meeting6 Pulsed Linac 1.3GHz SRF 3-8 GeV 5% duty factor at 10Hz

Project X Review/Intro October 18, 2011Gollwitzer -- 7th IDS-NF Meeting7 Recycler/Main Injector/Beam Lines Upgrades to handle increase beam power Stripping H- and accumulation of protons at 8GeV

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, 2011Gollwitzer -- 7th IDS-NF Meeting8

October 18, 2011Gollwitzer -- 7th IDS-NF Meeting9 Chopping and Splitting Average

October 18, 2011Gollwitzer -- 7th IDS-NF Meeting10 Fine Chopping Average

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, 2011Gollwitzer -- 7th IDS-NF Meeting11

Neutrino Factory Layout October 18, 2011Gollwitzer -- 7th IDS-NF Meeting12 Accumulator Ring Compressor Ring 4MW Target ??

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, 2011Gollwitzer -- 7th IDS-NF Meeting13

Project X Upgrade Neutrino Factory October 18, 2011Gollwitzer -- 7th IDS-NF Meeting14 Front End (warm) H- ion source, RFQ, MEBT, Programmable Chopper System Initially 5mA Run 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, 2011Gollwitzer -- 7th IDS-NF Meeting15 3 GeV CW SRF Linac Average beam current 1mA 5mA 325 and 650MHz Retuning of couplers to be efficient May set initially for higher current

Project X Upgrade Neutrino Factory October 18, 2011Gollwitzer -- 7th IDS-NF Meeting16 Pulsed Linac 1.3GHz SRF 3-8 GeV 10% 5% duty factor at 10Hz 15Hz More RF power Upgrade of couplers More cryo capicity

Rings’ Concepts Simple numbers to start –T rev ~ 800 ns –f rf ~ 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 one October 18, 2011Gollwitzer -- 7th IDS-NF Meeting17

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, 2011Gollwitzer -- 7th IDS-NF Meeting18

Plan Set rings and beam lines lattice Studies of instabilities Write Task Force report on feasibility Move onto costing October 18, 2011Gollwitzer -- 7th IDS-NF Meeting19