1. Front End Test Stand (F.E.T.S.) Engineering Progress Report
for UKNFIC
by P. Savage
24th April 2008

2. Front End Test Stand (F.E.T.S.)
Radio Frequency Quadrupole (R.F.Q.)
Laser Based Emittance Measurement System
Beam Profile Measurement
Chopper
Low Energy Beam Transport (L.E.B.T.)
Ion Source

3. Ion source
H. V. cage constructed now.
H. V. platform in R8

4. The beam profile measurement tank design
6 x Turbovac MAG W830
Rail system
Turbovac 340M
Solenoid
Mirror motor cradle
900 magnets and
faraday cup
Lifting lugs
Toroid
Noryl isolator
CF100 cable port
Door chassis
Ion source flange
KF40 laser port
CF160 vacuum port

5. First tank + L.E.B.T. Low Energy Beam Transport (L.E.B.T.)
3 solenoid magnetic L.E.B.T., support structure and rail system currently being manufactured. To be delivered end of May.
Vee blocks for remaining 5 support stands to be delivered on 14th March.

6. Radio Frequency Quadrupole (R.F.Q.)
4m long 324 MHz 4-vane RFQ concept design. Next phase, the engineering design to begin September 2008.
0.5m long 324 MHz 4-vane cold model RFQ currently being tested at Imperial.

7. High speed beam chopper
Mike Clarke-Gayther
Ciprian Plostinar
A novel tandem chopper technique has been developed at RAL to overcome the conflicting requirements of fast rise time (< 2ns) and long flat-top (up to 100 s).
A ‘fast’ chopper creates a short, clean gap in which a ‘slow’ chopper can switch on. The fast pulser is limited in flat-top but can switch between bunches. The slow pulser cannot switch between pulses but can generate the required flat-top.
Fast and slow chopper modules
Chopper 1 (fast transition)
Chopper 2 / Beam dump (slower transition)
BEAM

8. IAP Frankfurt laser transverse emittance measurement system
Christoph Gabor
Jürgen Pozimski
IAP Frankfurt laser transverse emittance measurement system
will be adapted to the FETS requirements.
Schematic drawing of the set up to determine non destructively the transversal beam emittance, using laser detachment technique.
Distribution of the neutralized ions on the scintillating screen.