FETS ProgressUKNF OsC

21st June 2010

Dan Faircloth

Dan Faircloth

The Front End Test

StandTalk outline

1. High power H- ion source

4. 324 MHz, 3 MeV, 4 vane RFQ

3. Three solenoid magnetic LEBT

5. MEBT and beam chopper

6. Beam dump

2. Laser profile measurement

- A high power proton driver for the UKNF

FETS is a collaboration

Work presented here:D. Faircloth, A. Letchford, S. Lawrie, M. Clarke-Gayther, C. Gabor, P Wise, M. Whitehead, T. Wood, M. Perkins, M. Bates, C. Plostinar, D. Findlay, P. Savage,

D. Lee, S. Jolly, S. Alsari, A. Kurup, J. Pozimski, A. Bosco, G. Boorman, G. Blair, J. Feuchtwanger, F. J. Bermejo, J. Lucas, J. Alonso, R. Enparantza, I.

Ariz, P. Romano, A. Sedano, V. Etxebarria, H. Hassanzadegan, N. Garmendia, M. Eguiraun

1st FETS Beam April 2009

35 mA 200 µs 50 Hz Presented at PAC09

1. High Power H- Ion Source

Penning ‘Surface Plasma Source’ based on the successful ISIS design

Inside the 70 kV high

voltage platform

Latest beam current measurements

Discharge pulse length

70 mA H-, 1 ms pulse length at 50 Hz is achievable

2. Laser Diagnostics

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LASER

Photodetachment

Chargeseparation

Magneticdipole

I(t)1dim profile,

long. emi

I(x,y,t)2dim profile,

trans. emi

Detection ofdistribution

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y

z

Christoph Gabor

Laser Profile Measurement

Calculate profile using Maximum Entropy algorithm

David Lee

Improved Electronics developed by Imperial College and Royal Holloway

Avoids ground loops using opto-isolators

Saad Alsari + Gary Boorman

2202-001 2202-002 2202-003

More stable and higher power (20 W) laser on loan from Frankfurt University

3. Three solenoid magnetic LEBT

50 mA achieved at entrance of RFQ

John Back

Simulated

Measured

4. 324 MHz, 3 MeV, 4 vane RFQ

Pete Savage

RFQ construction techniques

Pete Savage

Different designs and novel cooling schemes investigated

Scott Lawrie

ANSYS Coupled solver processResonant frequency:

High-frequency electromagnetic eigenmode solver

Surface heat flux:Use macro to convert magnetic fields to thermal element

loads

Temperature distribution:Thermal solver

Vane and wall displacement:Structural solver

Frequency shift:Export results to MATLAB Slater perturbation algorithm

Scott Lawrie

Max Temperature = 37 °C

60W input RF power

ANSYS Simulation

Cold Model Tests

Temperature Rise 15 °C 15.6 °C

Frequency Shift -78 kHz -89 kHz

Max Structural Deformation = 0.3 mmRFQ cold model with 60 W DC input RF power and no cooling applied.

Reference Phase

Feedback Phase

RFQ Tuner System

Saad Alsari

Tuner tested on cold model

Control electronics complete

RFQ Modulation Design

Simon Jolly

Parameterized modulations in Autodesk Inventor

Electromagnetic fields solved in CST EM studio

Particle transport solved in GPT

5. MEBT and beam chopper

Beamline design

Re-buncher cavities

Permanent magnet quadrpoles

Chip Plostinar

Chopper Electrode Designs

Short length helical prototype

Short length planar prototype

Mike Clarke-Gayther

6. Beam dump

Rafa Emparanza

Manufacturing test

Thermal simulation Engineering design

In Summary

• Ion source and LEBT successfully commissioned

• Laser diagnostics progressing well• RFQ design nearing completion• Prototype chopper and MEBT design• Beam dump being manufactured