# Presentation: 393399

## Proton DriverGeneral MeetingKick-off Presentation

- G. W. Foster
- PD General Weekly Meeting
- Jan 12, 2005

## OUTLINE

- Purpose of Weekly General Meeting
- Elevator Speech on Proton Driver
- What we’ve been up to the last year
-  Technical progress since 2003
- Getting Plugged into Working Groups
- How to Educate Yourself Efficiently about the Proton Driver
- What’s Next

## Weekly General Meeting

- Inform FNAL Staff about what is going on
- 	~ 40% Physics
-   ~ 60% Technology
- Communication between working groups
-  _[http://](http://protondriver.fnal.gov/)__[ProtonDriver.FNAL.GOV](http://protondriver.fnal.gov/)_

## Working Groups

## 8 GeV Superconducting Linac

- “New” idea incorporating concepts from both the Spallation Neutron Source, RIA, and TESLA.
- Copy SNS & RIA Linac designs up to 1.3 GeV
- Use  “TESLA”  Cryomodules  from  1.3 - 8 GeV
- H- Injection at 8 GeV in Main Injector
-  ==> “Super-Beams” in Fermilab Main Injector:
-  2 MW Beam power at BOTH 8 GeV and 120 GeV
-  Small emittances ==> Small losses in Main Injector
-  Minimum (1.5 sec) cycle time
-  MI Beam Power Independent of Beam Energy
- 			*	**==****>**** (flexible neutrino program)*

## 8 GeV Superconducting LinacWith X-Ray FEL, 8 GeV Neutrino & Spallation Sources, LC and Neutrino Factory

- 8 GeV Superconducting LinacWith X-Ray FEL, 8 GeV Neutrino & Spallation Sources, LC and Neutrino Factory

**Anti-**
**Proton**

## 8 GeV SC Linac Proton Driver

- A Bridge Program to the Linear Collider
- Near Term Physics Program (neutrinos+)
- Multiple HEP Destinations & Off-Ramps
- A seed project for Industrial Participation
*50 cryomodules, 12 RF stations, ~1.5% of LC*

## Proton Driver Linac Parts

- MAIN “TESLA” LINAC  (1-8 GeV)
- ~  Exact copy of TESLA,   1.5% of LC
- Beta<1 “Squeezed TESLA” Linac
- “SNS” SCRF linac at   f = 1300 MHz
- “Pulsed RIA” Front End Linac
- spoke SCRF cavities at 325 MHz
- H- Source & RF Quad
- ~  Copy of JPARC 325 MHz front end

## 0.5 MW with TESLA Frequencies & SCRF F.E.

## Linac Technical Strategy

- TESLA compatible frequency chosen
- Prototypes & vendors exist for 7/8 of linac
- Complete overlap with LC test facility
- Staging Stand-Alone Linac Beam Power
- Cut Klystron count from 42  12
- Preserve 2 MW beam power in MI
- Adopt “Pulsed RIA” SCRF front end

## Upgrade Strategy: Add Klystrons

## Cost Driver: Klystrons per GeV

## Proton Driver Beams

|  | INITIAL | ULTIMATE | TESLA |
| --- | --- | --- | --- |
| Beam Power | 0.5 MW | 2.0 MW | 23 MW |
| Beam Current | 8.3 mA | 25 mA | 9.5 mA |
| Beam Pulse | 3 msec | 1 msec | 1 msec |
| Rep Rate | 2.5 Hz | 10 Hz | 5-10 Hz |
| Klystrons | 12 | 36 | 584 |
| Cavities / Klystron | 36:1 | 12 : 1 | 36 : 1 |

## 120 GeV Main Injector Cycle with 8 GeV Linac, e- and P

## 120 GeV Main Injector Cycle with 8 GeV Synchrotron

## Linac Allows Reduced MI Beam Energy without Compromising Beam Power

- MI cycles to 40 GeV at 2Hz,
- Retains 2 MW MI beam power

- # neutrino evts.         ~ same vs. E
- Reduces tail at higher neutrino energies.
*Permits Flexible Neutrino Program*

- 2MW @40 GeV
- NOT SPECIFIED
- FOR SYNCHROTRON

## Baseline Design

- Only bare H- Linac or Synchrotron
-  _0.5 MW Stand-Alone Power_ *(& 2 MW upgrade path)*
- Main Injector Intensity Upgrades for 2MW
- Reference Experimental Program -TBD

## Main Injector Intensity Upgrade

-        RF:  Major upgrade. Need a second power amplifier for each cavity (and 4 more cavities for synchrotoron option).
-        Power supply: moderate upgrade (for synchrotron option)
-         Magnet: OK.
-         Shielding & Beam Dump: OK.
-         Cooling capacity: OK for magnet, needs to be doubled for RF.
-         Gamma-t jump system: New.
-         Large aperture quad: New. *(In Progress for Run II / NUMI)*
-         Collimation system: New. *(In Progress for Run II / NUMI?)*
-         Passive damper and active feedback: (New..?)
-         Stop band correction: New.
-         NuMI and other 120 GeV Beamlines: Under study.

_*http://www-bd.fnal.gov/pdriver/*_

## Some Developments

- 1st Round of PD Design Studies Completed 2003
- PD Recommendation by FLRPC early 2004
- New Design Iteration Started
- Goal: CD-0 Documentation by “End of ’04”
- Both Synchrotron and SCRF Linac (emphasized)
- ITRP Decision Adds Momentum to SCRF
- US SCRF Collaboration enthusiasm for PD
- Workshop on H- Transport & Injection gives clean bill of health to 8 GeV linac parameters
- Successful tests of prototype fast-Phase shifters

## New Proton Driver Charge Letter

## Proton Driver Charge (machine)

- Goal: CD-0 Documentation by End of ’04
- Target is now March ’05 Director’s Review
- Both Synchrotron and SCRF Linac (emphasized)
- Common Performance Specs and Cost Basis
- External Review of Accelerator Physics
- Investigation of Outside Collaboration

## PD Work in Progress ...

- Weekly meetings in specific technical areas (four)  (six)
- See _[http://ProtonDriver.FNAL.GOV](http://protondriver.fnal.gov/)_
- Visits from experts, workshops
- Prototypes of key components
- Developing Collaborations

## Slide 23

## JHF 325 MHz RFQ and Klystrons  for TESLA-Compatible* Front End

- JHF  325 MHz
- 3 MW Klystron

- JHF 325 MHz RF Quad

- JHF 325 MHz RFQ and Klystrons  for TESLA-Compatible* Front End

- * TESLA frequency  =  1300  MHz
- = 4*325 MHz

**LANL  (APT)**

**ANL  (RIA)**

## End-to-End Beam Physicsof TESLA-Compatible Linac(P. Ostroumov, ANL)

## 8 GeV Superconducting LinacTECHNICAL SUBSYSTEM DESIGNS EXIST AND WORK

- SNS Cavites (JLAB)

**FNAL/TTF**
**Modulators**

**“****TTF Style” Cryomodules**

**Civil**
**Const.**
**Based on **
**FMI**

**TESLA  RF**
**Distribution **
*** w/ phase shifters**

## Advanced RF Distribution(Coaxial Phase Shifter Option) 

- Advanced RF Distribution(Coaxial Phase Shifter Option)

- DIRECTIONAL
-  COUPLER
- (POWER SPLIT)

- MAGIC TEE
- AND CAVITY RF
- POWER COUPLER

- CIRCULATOR
- AND LOAD

- COAXIAL
- FERRITE STUB
- TUNER AND
- WAVEGUIDE
- TRANSITION

**RF FROM**
**KLYSTRON**

-  E

- /

- YET!

## Fast-Ferrite Phase Shifter R&D

## THE NEXT STEP

- There is a 100% overlap in the plans for the next step of the  SCRF Proton Driver and the SCRF Linear Collider:
_***Set up 1 GeV of TESLA linac***_
-  At Fermilab
-  With as many US-built components as possible

## Slide 31

## FNAL Meson Area SMTF Layout Example

## THE NEXT NEXT  STEP

_***Demonstrate a 325 MHz ***_
_***TESLA-Compatibile SCRF linac***_
_***For Protons and Ions***_
-  At Fermilab
-  With as many components from new collaborators and vendors as possible

## 325 MHzFront-EndLinac

- 325 MHzFront-EndLinac

- 325 MHz Klystron – Toshiba E3740A  (JPARC)

- 115kV Pulse Transformer

**Modulator**
- Capacitor / Switch / Bouncer

- Charging
- Supply

- RFQ

- MEBT

- SCRF Spoke
- Resonator
- Cryomodules

- RF
- Distribution
- Waveguide

- Ferrite
- Tuners

- Single Klystron
- Feeds SCRF Linac
- to E > 100 MeV

## Slide 35

## Single Module Including:
Circulator / Isolator
Hybrid(s) & loads
Two Fast-Ferrite Tuners

Complete resonance control for One Cavity
  Low power versions may fit on Single Circuit Board

- Circulator / Isolator
- Hybrid(s) & loads
- Two Fast-Ferrite Tuners
- Complete resonance control for One Cavity
-   *Low power versions may fit on Single Circuit Board*

- Fast Ferrite I/Q Modulator Concept

## How to Educate Yourself Efficiently about the Proton Driver

- Read Hassan Padamsee’s Book on SCRF Technology
-  His FNAL lectures should be online soon
- Read the 2003 PD Linac Design Report
- Read the 1999 SNS SCRF Design Report
- Read the TESLA TDR
- Browse the links on
- 	_[http://ProtonDriver.FNAL.GOV](http://protondriver.fnal.gov/)_
- 	 including the big pile of relevant papers linked from there

## 2003 Design Study

- 125 Page Design Study
- Cost Estimate Spread Sheet  w/ BoE
- _http://tdserver1.fnal.gov/project/8GeVlinac_

## What’s Next(a personal view of where the Proton Driver could & should be going)

- Technical hurdles have been cleared:
-    (H- stripping & fast phase shifters)
- Teams have been assembled in (most) key areas
- SMTF (Meson Area SCRF) Collabortion is functioning
- Ready for a positive decision