# Presentation: 034856

## Proton DriverProject Development,Tactics & Strategy

- G. W. Foster
- Fermilab User’s Meeting
- June 3, 2004

## This is supposed to be a non-technical talk

* ... **I’ll do my best....*

## Some Developments

- 1st Round of PD Design Studies Completed
- PD Recommendation by FLRPC
- New Design Iteration Started
- Goal: CD-0 Documentation by End of ’04
- Both Synchrotron and SCRF Linac (emphasized)
- US SCRF Collaboration enthusiasm for PD
- ITRP Decision Pending

## Proton Driver Synchrotron & Linac

- SYNCHROTRON
- Sited West of the existing booster
- Re-uses existing linac enclosure
- 8 GeV LINAC
- Baseline Site injects at MI-30 straight section
- Others possible

## Q:  WHAT IS THE SIGNIFICANCE OF THIS NUMBER ?

- A: this is the number of vacuum tubes required to accelerate beams to 8 GeV in Fermilab’s current Proton Source.

**451**

## 8 GeV Superconducting Linac

- New idea incorporating concepts from both the Spallation Neutron Source (SNS) and TESLA.
- Copy SNS Linac design 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*

## New Proton Driver Charge Letter

## Proton Driver Charge (machine)

- Goal: CD-0 Documentation by End of ’04
- 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)
- Visits from experts
- Prototype key components
- Develop Collaborations

## 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

## Cost Driver: Klystrons per GeV

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

## COLLABORATION

- Will be key to the success of
-  the SCRF Proton Driver
-  the LC test facility
- ... and can speed up both if they are the same project.

## Slide 16

## 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!

## 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

## Fermilab’s Assets

- Cryogenics
- Beamlines
- Near-term project: SCRF Proton Driver

**MESON AREA CRYOGENICS**

- TRANSFER
- LINES

- MESON CRYO PLANT

***Immediate Support for (1) TESLA RF Station and  (4) TESLA Cryomodules***

## Recognize the Handwriting?

*Helen Edwards*

## Final Questions

- Is the LC / PD decision point 2008?
- Impact of LC Technology decision
-  on collaboration
-  on US HEP
- Funding Profile & Schedule depending on whether BTeV     does / does not survive reviews...