1. Welcome to the RFQ Meeting
Good morning
and
Welcome to the RFQ Meeting

2. Agenda 20. Nov. 10:00 Welcome and introduction W. Vinzenz 10 min.
10:10
Source
R. Berezov / R. Hollinger
10:20
RF System
G. Schreiber
10:30
Beam Instrumentation
P. Forck
10:40
Experience with the design, fabrication and tuning of the Linac4 RFQ
C. Rossi CERN
20 min.
11:00
Coffee
15 min.
11:15
LINAC4 RFQ commissioning and measurements
A. Lombardi CERN
11:30
Design proposal for a 325 MHz RFQ and operational experience of pulsed 4-rod RFQs
H. Podlech IAP
30 min.
12:00
Proposal of a 325 MHz, 3MeV Ladder-RFQ
U. Ratzinger IAP
12:30
Lunch
1:30 h
14:00
4 vanes RFQ expertise at AVS
Alberto Garbayo AVS
14:30
Discussion Beam parameters RFQ input
all
1:00 h
15:30
15:45
Discussion
1:15 h
17:00
End

3. Agenda 21. Nov. 9:30 Welcome and introduction W. Vinzenz 10 min. 9:40
Risks during production and cost
all
1:20 h
11:00
Coffee
15 min.
11:15
Comparison in terms of tuning and repair
1:15 h
12:30
Lunch
13:45
Summary and Statement
1:30 h
15:30
End

4. Introduction The FAIR Proton Linac subject of the meeting
Energy MeV max.
Current mA for SIS18
70 mA max.
Protons/pulse 7,9x1012
French contribution
French contribution
95 keV
3 MeV
ECR Proton Source
LEBT RFQ Bu CCH 1 – Bu CH 4 – 6
subject of the meeting
100 mA
29,50 m
Transfer channel
UNILAC – SIS 18

5. Ladder 4-Rod 4-Vane RFQ parameters What‘s the best choice ? 95 keV ??
3 MeV
Ladder
4-Rod
4-Vane

6. The requirements on the cavity are:
RFQ parameters
The requirements on the cavity are:
Best matching of the target parameters
High transmission rate
High stability during beam pulse
High thermal stability
Sparking rate as low as possible
and further on
Best mechanical design (cooling channels and so on)
for low maintenance
Simple design for easy manufacturing, easy repair
and reproduction
And all this for a good price

7. RFQ parameters Parameter Units Injection energy 0.095 MeV
Extraction energy
3.00 MeV
Particles to be accelerated 
protons
Input current
<= 100 mA
Input emittance (transv., norm., tot.)
≤ 2.5 mm mrad
Output current
> 80% of input current
Output emittance (transv., norm., tot.) 
≤ 2 mm mrad
Output emittance (long., tot.)
≤ 930 keV deg
Mean aperture radius
≤ 3,9 mm
RF-frequency
MHz
Max. RF-input power
≤ 1.0 MW
RF-pulse length
200 µs
Beam Pulse length
36 µs
Repetition rate
4 Hz
Cooling
H2O, 11 bar, 10 l/min; Tin = 25 °C
Temperature tolerances
Tin – Tout ≤ 4 K, δT ≤ 2 K
Maximum electric surface field
≤ 36.6 MV/m (= 2.0 EK)
Total cavity length
< 3.3 m

8. The best results of our meeting could be:
Summary
The best results of our meeting could be:
Adding up all information to identify
an optimized solution
...that we can present a clear statement at the
MAC meeting next week
And that we meet again time by time to report
how the RFQ is running
And now I wish a fruitful and interesting discussion