Activities at the University of Frankfurt (IAP)
Holger Podlech
●
Ulrich Ratzinger
●
Oliver Kester
Institut für Angewandte Physik (IAP)
Goethe Universität Frankfurt am Main
H. Podlech
70 MeV p – Linac Development for FAIR
70 MeV p – Linac Development for FAIR
U. Ratzinger, H. Podlech
Development of 325 MHz
Development of 325 MHz
Ladder and 4-Rod RFQ
IAP-GSI
First coupled CH-cavity ready for copper plating, tests
with 3 MW Klystron next year (U=13 MV)
The Frankfurt Neutron Source FRANZ
The Frankfurt Neutron Source FRANZ
The front-end down to RFQ – injection is undergoing beam tests since summer 2013.
All RF power amplifiers are installed. Cavities will be tested until summer 2014
H. Podlech
17 MeV 176 MHz Injector for MYRRHA
17 MeV 176 MHz Injector for MYRRHA
• 4 mA Proton beam
• Cw operated
• High reliability
• High reliability
• Double Injector
Fi l
600 M V
• Final energy 600 MeV
• P=2.4 MW
30 keV 1 5 MeV 3.7 MeV 17 MeV
30 keV 1.5 MeV
4-Rod-RFQ
5x rt CH
6x sc CH
cw Operated High Power 4-Rod RFQ
cw Operated High Power 4-Rod RFQ
Power level up to 70 kW/m, optimized cooling, prototype presently under test
with 300 kW Amplifier
with 300 kW Amplifier
cw Operated rt CH-Cavities (FRANZ MYRRHA GSI cw Linac)
cw Operated rt CH-Cavities (FRANZ, MYRRHA, GSI cw Linac)
Power level up to 40 kW/m
Power level up to 40 kW/m
Superconducting CH-Cavities
Superconducting CH-Cavities
Test of the new 325 MHz sc CH-cavity (
=0.16)
H. Podlech
CW Heavy Ion Linac Demonstrator at GSI
CW Heavy Ion Linac Demonstrator at GSI
Development and beam test of a 217 MHz sc CH-cavity at HLI/GSI
Helium vessel Tuner flange
IAP-HIM-GSI
Helium vessel Preparation flange Inclined d t gCoupler flange Pickup flange end stem
Cold mass and space frame of new
horizontal cryo module
Unilac – Upgrade, High Field Cavity Development
Unilac
Upgrade, High Field Cavity Development
The GSI – Unilac has to be improved and partly has to be rebuilt to fulfil the needs
of an universal FAIR ion injector
of an universal FAIR ion injector.
- Optimization of the High Current Injector HSI
- Optimization of the 1.4 AMeV stripper section
p
pp
IAP-GSI
- Rebuilt of the Alvarez – section
IAP investigates achievable voltage gains by CH – structures for the interesting
velocity range
Number of Gaps
7
Frequency (MHz)
325.2
Voltage Gain (MV)
6
Eff Accel Length (mm)
529 6
Eff. Accel. Length (mm)
529.6
Eff. Accel. Field (MV/m)
11.2
Power Loss (MW)
o e
oss (
)
1.58
.58
Q
0– value
13500
Effective Shunt impedance (M
Ω
/m)
57.3
H. Podlech
Beam Aperture (mm)
27
High Current Storage Ring
High Current Storage Ring
IAP
investigates
longitudinal
magnetic
guiding
field
arrays
similar to stellarator configurations (Figure
‐
8 Configuration) for low energy
high current beam rings Beam experiments with two 30 deg 0 6 T toroids are
high current beam rings. Beam experiments with two 30 deg, 0.6 T toroids are
performed to test beam simulation tools.
U Ratzinger
U. Ratzinger
Electron Target
Ion electron interaction processes (cross sections
Electron Target
Ion – electron interaction processes (cross sections measurements, ionization and recombination studies)
Relevance for beam transport sections and ion sources
Simple concept no magnetic field sheet beam
Simple concept, no magnetic field, sheet beam
“animated beam technique”
Setup under evaluation at test beamline
S. Geyer et al., “A Transverse electron target for the investigation of electron-ion interaction processes”,
to be published in Physica Scripta
S. Geyer et al., “A Transverse Electron Sabrina Geyer
H. Podlech
y
Target for Heavy Ion Storage Rings”,
Proc. of IPAC 2013, Shanghai, China, MOPEA015
y
Institute of applied physics (University of Frankfurt)
Dynamic Vacuum
Dynamic Vacuum
Beam losses due to impact ionization of
Equilibrium residual gas p
beam ions with rest gas atoms
Low rest gas pressure and low desorption
q g
densities in the SIS100 calculated by StrahlSim: The effect of thermal transpiration has been
rate required
Simulation with StrahlSim code
Hydrogen pressure in SIS100
added to the simulation. The simulated pressure and density in cold areas has significally
Hydrogen pressure in SIS100 to high Cryo adsorption
decreased. (red: previous result, black: new result)
Experiment to determine the sticking coefficients
d j ti
and mean sojourn time on cryogenic surfaces.
StrahlSim update
Frederic Chill
Primary beams (GSI)
Institute of applied physics
p
Simulation of the experiment in MolFlow: Gas particles (green) are traced until they stick to the cold surface (red). Their
resulting density ratio is thereby linked to Measurement setup in
(University of Frankfurt)
g y y
the sticking coefficient.
p the lab
Beam Loss Monitors
Beam Loss Monitors
Beam losses in FAIR synchrotrons
activation of machine components
Response function for p known SPS Ionization
Response function for p known SPS Ionization chamber
Heavy ions, different species Benchmarking: FLUKA and Geant4 simulation
LHC Ionization chamber response function
Real beam-loss experiment
Definition of beam loss Definition of beam loss scenarios for simulation: SIS18, SIS100
Vladimir Lavrik
Beam diagnostics (GSI)
Institute of applied physics
V. Lavrik, “Beam loss monitoring study at GSI” available online on the web site www.fluka.org, presentation has been done for 2ndFLUKA Advanced Course and Workshop.
H. Podlech
Institute of applied physics (University of Frankfurt)
Single-Knob Beam Line for Transverse Emittance Partitioning
Single-Knob Beam Line for Transverse Emittance Partitioning
Dr. Chen Xiao
LINAC (GSI)
Institute of applied physics (University of Frankfurt)
The shape of the horizontal and vertical beta-function does
The shape of the horizontal and vertical beta function does
depend on the solenoid field strength just between the
solenoid entrance and the exit of the last skew quadrupole, i.e.
along the part of the beam line where inter-plane coupling is
C.Xiao, O. K. Kester, L. Groening H. Leibrock, M. Maier, and P. Rottlander, Phys. Rev. ST
g
p
p
p g
non-zero.
, , g , , , y
Scintillator Screen Studies
Scintillator Screen Studies
Scintillator screens
day zero diagnostics in beam transport lines (medium energies)
lines (medium energies)
Problems: Dynamic range, aging, material dependence of the measurements
dependence of the measurements
We are interested in the beam-flux and pulse length dependence of the light yield
Application pepper pot emittance meter Application pepper-pot emittance meter
Dr. Eiko Gütlich
Beam diagnostics (GSI)
E. Gütlich et al., "Scintillation screen studies for high dose ion beam applications, " IEEE
T i N l S i V l 59 N 5
H. Podlech
g ( )
Institute of applied physics (University of Frankfurt)
Transactions on Nuclear Science, Vol. 59, No. 5, pp. 2354 - 2359, October 2012.