1. Project X: 8 GeV Transfer and Injection Injection Painting Kick-off meeting Dave Johnson APC/HINS June 27, 2008 Beams-doc 3129

2. June 20, 20082 Project X Requirements Baseline Linac running @ 5Hz and 9mA avg. current 1ms pulse length –delivers 5.6E13/pulse at 72 kW/pulse -> 2.8E14/sec for 360 kW For neutrino program: MI cycle of 1.4 sec -> 3 linac pulses ->1.7E14 for 154 kW at 8 GeV and 2.3MW at 120 GeV (4 linac pulses left over i.e. 200 kW @ 8 GeV Upgrade paths –increase linac pulse length 1ms -> 3 ms –linac average current 9 mA -> 27 mA –linac rep rate 5 Hz, 10Hz, 15 Hz ??? –Example: 10Hz at 25 mA still 1ms -> 1.56E14/pulse yields 2 MW (1.56E15) at 8 GeV –Scenarios: Inject/Extract each linac cycle (1 pulse to Recycler, 9 pulses elsewhere?) From Project X RD&D Plan presentation, May 28, 2008 – Dave McGinnis ->1.5E15 protons/sec ->2.8E14 protons/sec

3. June 20, 20083 Project X RD&D Program Goals The goal of the Project X RD&D program is to provide support for a Critical Decision 1 (CD-1) in 2010, leading to a CD-2/3a in 2011. –Design and technical component development; –Development of all project documentation mandated by DOE 413.3; –Formation of a multi-institutional collaboration capable of executing both the R&D plan and the provisional construction project. The primary technical goal is completion of a Conceptual Design Report, followed by a fully developed baseline cost estimate and schedule, and supported by a technology development program. –Capability of delivering in at least 2 MW of beam power over the range 60 – 120 GeV, simultaneous with at least 200 kW of beam power at 8 GeV. 3 From Project X RD&D Plan presentation, May 28, 2008 – Dave McGinnis

4. June 20, 20084 Project X RD&D Plan for FY08 The main goal for the Project X RD&D Plan for FY08 is –to get an initial cost estimate for Project X for CD0. –Begin on long-term R&D items To prepare an initial cost estimate for CD0, the design of Project X must be further developed. To organize the labor resources in FY08, each level 2 manager reviewed the FY08 goals formulated in the RD&D plan. See http://projectx.fnal.gov/RnDplan/index.html From Project X RD&D Plan presentation, May 28, 2008 – Dave McGinnis 4 The basic scheme of Project X is: –An 8 GeV Linac operating at ILC-like parameters –H- stripping and proton accumulation in the Recycler –Beam distributed to the Main Injector for acceleration to 120 GeV –Beam distributed to an 8 GeV slow spill program The major components that comprise Project X are: (Task groups) –A front end linac operating at 325 MHz (max energy 600MeV). –An ILC-like linac operating at 1300MHz. –An 8 GeV transfer line and H- Injection system. See next slide –The Recycler operating as a stripping ring and a proton accumulator. –The Main Injector acting as a rapid cycling accelerator. –A slow extraction system from the Recycler. –120 GeV Neutrino beam line. –Civil Construction and Utilities –Controls –Cryogenics Refine conceptual design where an initial cost estimate could be started this fall working toward a CD0 next spring

5. June 20, 20085 Project X FY08 Goals for 8 GeV Injection 1.Create a viable Recycler injection straight section and transport line interface to the injection straight section and injection absorber. Integrate solutions with the new Recycler ring lattice. 2.Revise Proton Driver Injection absorber design for Project X beam parameters. 3.Initialize simulations for transverse phase space painting. 4.Evaluate the stripping efficiency, losses, impact on circulating beam, and technological feasibility of carbon foil stripping and laser stripping techniques for 98% to 99% stripping efficiency utilizing Project X beam parameters. 5.Begin Conceptual Design of transverse collimation absorbers Note: that there is/will be some overlap between topics in items 3 and 4. 5 From Project X RD&D Plan presentation, May 28, 2008 – Dave McGinnis

6. June 20, 20086 Intensities and Scenarios Base line design –Linac 9mA average current with 1 ms pulse length 5.6e13/pulse is 72 kJ/pulse -> implies ~90 turn injection –Linac running this intensity at 5 Hz is 2.8E14/sec or 360 kW injected. –For MI injection Recycler will accumulate up to 3 linac cycles for 1.68E14 protons then single turn transfer to MI –MI cycle 1.4 sec -> 7 linac cycles/MI cycle: 3 for MI and up to 4 for “others” –For 8 GeV program, inject and extract individual linac cycles ? –Assume linac emittance ~ 2.5  we want to paint the 3 cycles to 25  max –For individual injections/extractions paint to 8  or 25  or something in between ? Upgrade to 2 MW –Increase linac average current X3? –Increase pulse length X3? –Increase rep rate X2? –1.6E15/sec injected –How is this to be utilized? Inject/extract? Accumulation? How many pulses? –What is the impact of higher intensity on painting? The question of whether Recycler “can handle this intensity” is to be addressed by the Recycler group. NOTE: –the ratio of  m /  i for SNS ~ 40, JPARC ~ 36, Project X ~10 or less, depending –the ratio of Recycler acceptance to final emittance < x2 Vertical and <x3 Horizontal

7. June 20, 20087 Project Layout (Proton Driver-> Project X) Existing 8 GeV line enclosure Existing 8 GeV line New Proton Driver transport line Existing Main Injector MI-10 New Proton Driver /8GeV line Enclosure INJECTION ABSORBER TRANSVERSE COLLIMATION MOMENTUM COLLIMATION LINAC DUMP LINAC See Beams doc 2597

8. June 20, 20088 Option for Project X Transport Line The upstream end of the transport line remains unchanged. The new vertical bend section moves transport line further under MI-65 (needs to be verified) Option II is to change elevation of entire beam line and linac Option III is to move dog leg elsewhere Solution will be greatly influenced by civil construction issues. collimation New section injection Defines beam size on foil, hence specifications for injection foil ~achromatic

9. June 20, 20089 Initial Recycler Lattice Modifications Qx=25.445 Qy=24.134  x~70  y ~30 ~25m No tuning ! Issue: use phase trombone for tune control add distributed quads for tune control Next slide Dispersion “free”

10. June 20, 200810 Injection region (between quad doublet) Layout used for Proton Driver injection into Main Injector 150 mm offset dictated by MI geometrical constraints and missing MI magnets The DC chicane could become ramped bump Start paint End paint DC orbit (Chicane) Removal from foil Next slide

11. June 20, 200811 Injection layout Layout used for Proton Driver injection into Main Injector HBC1 HBC2 HBC3HBC4 75 to 100 mm 8.941 m 0.606 m 1.068 m Stripping foil H-H- H0H0 H + to inj. absorber Thick foil H 0 ->H + Circulating protons foil MagnetLength [m] Strength [kG] Theta [mr]H & V Aperture [in] HBC10.7 +3.5669+8.42116 x 2 HBC26.0 -0.4656-9.421112 x 2 or 3? HBC32.0 -5.5620-37.517912 x 3 (?) HBC41.0+11.4206+38.517912 x 3 (?)

12. June 20, 200812 Current scheme Current scheme is anti-correlated horizontal painting and vertical steering. Suggested by KEK and implemented into STRUCT MI CL 0 mm 100 mm  33 (inj) 150mm Chicane (DC Bump) Start Paint 150 mm Removal Offset Painting  33 (cir)  11 (inj)  11 (cir) Total H - Injection Orbit B 0 = maximum kick N = Number turns to paint n = turn number P = Painting displacement R = Removal displacement T = Total displacement Foil support Foil Maximum kick, B 0 [kG]10.98 Painting Displacement, P [mm]10.45 Removal Displacement, R [mm]39.54 Offset [mm]33.05

13. June 20, 200813 Power Supply waveforms for 3 linac cycle injection Waveform for anti-correlated H paint/ V steer Linac cycle 200 ms –Inject 1 ms –Move circulating beam off for 199 ms –Restore to last injection position Initial concept has been discussed with Steve Hays Details of magnet parameters, timing, tuning, flexibility, magnitude of orbit movement, etc. are to be worked out End 1 st injection End 2 nd injection End 3 rd injection Foil (injected beam) Closed orbit movement Move off foil Start injection Stripping foil Closed orbit Ignore x-axis label

14. June 20, 200814 Exponential Painting Bumps for Anti-correlated painting Bumps proposed by Joanne Beebe-Wang (BNL) for 3ms anti- correlated h paint/v steer PD injection. X = A+Bexp(-t/  ) Y’ = A+Bexp(t/  ) We would like to compare the resultant phase space, number or parasitic hits, etc. between the exponential functions and the square root functions.

15. June 20, 200815 Goals/Questions We would like to investigate both correlated and anti-correlated painting Investigate foil orientation and impact on number of circulating hits Investigate KEK and exponential functions Do either functional forms create a distribution close-enough to a KV distribution which minimizes space charge tune shift Compare results with STRUCT and ORBIT Understand how each code treats interaction of circulating beam with foil. What kind of field descriptions are required? –Foil in rising edge of 3 rd chicane dipole Investigate impact of space charge on resultant phase space. Minimize number of foil hits from circulating beam Investigate power supply requirements for injection kickers bumps

16. June 20, 200816 TASK: Initialize simulations for transverse phase space painting Deliverables: –Specifications for phase space painting magnet requirements –Conceptual design of power supply for phase space painting magnets –Status report on phase space painting simulations David Johnson –Classification: Eng. Physicist –Percent Effort: 10% –Duration 5 months –Task: Provide requirements and parameters for phase space painting. Coordinate simulations and provide initial parameters for magnet and power supply designs. Sasha Drozhdin –Classification: Scientist –Percent Effort: 50% –Duration 4 months –Task: Make necessary code changes and implement new Recycler Ring Project X injection optics into STRUCT and initiate transverse painting simulations. Leonid Vorobiev –Classification: Scientist –Percent Effort: 50% –Duration 4 months –Task: Make necessary code changes and implement new Recycler Ring Project X injection optics into ORBIT and initiate transverse painting simulations. Steve Hays –Classification: Engineer –Percent Effort: 15% –Duration 2 months –Task: Generate a conceptual design for power supply system capable of creating the flexible waveforms required for transverse phase space painting.

17. June 20, 200817 Action Items What do we need to do to get started? Are the currently defined deliverables and tasks appropriate? Any modifications? What is required to implement various painting schemes into ORBIT and STRUCT? What kind of input phase space needs to be produced (from TRACK)? Can the MI PD lattice be utilized while RR lattice is being developed? Do we need to bring anyone else on board immediately? Longevity of ORBIT support at FNAL? Regular meetings ? Frequency? Anything I forgot?