A linear collider for the future Physics, Accelerator, detectors Yannis Karyotakis.
Accelerator Physics and Integrated Detectors
Transcript of Accelerator Physics and Integrated Detectors
Accelerator Physics and Integrated
Detectors
Status Report
Kurt Aulenbacher, Winfried Barth
Session of the HIM Scientific Council
2015, April 21
Accelerator Physics and Integrated
OUTLINE
• THE INFRASTRUCTURE, THE PROJECTS
AND THE TEAMS
• SHE-LINAC PROJECT
• HESR-COOLER PROJECT
Accelerator Physics and Integrated Detectors
Infrastructure, SHE-LINAC, HESR-research & more
ACID-HESR (Cooler):
Head: Kurt Aulenbacher
Staff: Andre Hofmann (Post-Doc)
Mirko Schwartz (Technician)
Jürgen Dietrich (consultant)
Students: T. Weilbach (PhD ~ 2014)
M. Bruker (PhD ~ 2015)
J. Friedrich (Ma-Sc 2013)
(Ba-Sc 2011 )
T. Stengler (Ma 2014)
(Ba 2012)
Acid Section Head:
JGU Prof W3 Kurt Aulenbacher
Co-Section Head
GSI Section leader Winfried Barth
ACID-SHE Linac:
Head: Winfried Barth
Staff: V. Gettmann (Eng)
S. Jacke (Post-Doc)(open
position)
Students: M. Amberg (PhD ~ 2014)
U.Ratzinger GUF
H. Podlech GUF
D. Bänsch GUF
F. Dziuba GUF
S. Mickat
project coordinatorGSI
W. Barth GSI
W. Vinzenz GSI
H. Mueller GSI
C. Schroeder GSI
Objective 2018:
Solve open issues for
8MV HESR cooler
Objective 2018:
From demonstrator to working
multi cavity system
Lq. He transfer
(from KpH) g He transfer
(to KpH)
KÜHLER-
MAGNET-LAB
(HESR-cooler
&more
BUNKER-LAB
SHE-LINAC
(SRF)
Common-infrastructure:
REINRAUM
Accelerator Physics and Integrated Detectors
Infrastructure, SHE-LINAC, HESR-research&more
ACID-HESR (Cooler):
Head: Kurt Aulenbacher
Staff: Andre Hofmann (Post-Doc)
Mirko Schwartz (Technician)
Jürgen Dietrich (consultant)
Students: T. Weilbach (PhD ~ 2014)
M. Bruker (PhD ~ 2015)
J. Friedrich (Ma-Sc 2013)
(Ba-Sc 2011 )
T. Stengler (Ma 2014)
(Ba 2012)
Acid Section Head:
JGU Prof W3 Kurt Aulenbacher
Co-Section Head
GSI Section leader Winfried Barth
ACID-SHE Linac:
Head: Winfried Barth
Staff: V. Gettmann (Eng)
S. Jacke (Post-Doc)(open
position)
Students: M. Amberg (PhD ~ 2014)
U.Ratzinger GUF
H. Podlech GUF
D. Bänsch GUF
F. Dziuba GUF
S. Mickat
project coordinatorGSI
W. Barth GSI
W. Vinzenz GSI
H. Mueller GSI
C. Schroeder GSI
Objective 2018:
Solve open issues for
8MV HESR cooler
Objective 2018:
From demonstrator to working
multi cavity system
Lq. He transfer
(from KpH) g He transfer
(to KpH)
BUNKER-LAB Main topic: SHE-LINAC
Leader: W. Barth
Post-Docs/Scientists:
S. Mickat
M. Busch (7/2015)
PhD:
M. Amberg
Engineers/Technicians
V. Gettmann
Collaborators:
Group of H. Podlech
U-Frankfurt
COOLER/MAGNET-LAB Main topic: HESR-COOLER
Leader: K. Aulenbacher
Post-Docs/Scientists:
A. Hoffmann
P. Bartholome (5/2015)
PhD:
M. Bruker
T. Weilbach
Engineers/Technicians
M. Schwartz
Collaborators:
V. Kamerzhev, FZJ
(+HESR-group)
nc-CH-cavity
sc-prototype, 360 MHz
sc-325 MHz
UNILAC-booster cavity
rt-325 MHz Alvarez
HSI 36 MHz@gsi
HLI 108 MHz@gsi
IH 216 MHz@HIT/Heidelberg
Wideröe
Accelerator Physics and Integrated Detectors
Infrastructure, SHE-LINAC, HESR-research
Infrastucture for she: present & future
• LHe volume 750 l
• Magnetic field shielding
• 4 K and 2 K operation
• high pressure rinsing
• rf testing (warm & cold cavities)
• cleanroom environment
• optional: setup for BCP
IAP @ Uni Frankfurt Planned infrastructure @ HIM
High charge
state
injector@GSI
GSI-
UNILACcw-LINAC
Beam Intensity (particles/sec)
(S. Hofmann et al, EXON 2004)3 *1012 6 *1013
Beam on target 10 weeks 4 days
GSI-
UNILACcw-LINAC
Beam Intensity (particles/sec)
(S. Hofmann et al, EXON 2004)3 *1012 6 *1013
Beam on target 10 weeks 4 days
GSI/HIM-SHE-progr.
Superconducting cw-linac layout
Super Heavy community High duty factor, 7.5 MeV/u, variable beam energy, heavy ion linac
Superconducting CW-LINAC Layout
HLI
injector@GSI
• Multigap CH-cavities
• Small number of rf cavities and short cavity lengths (up to 1m)
• acc. gradient of 5 MV/m compact linac design
• Several cavities, solenoids per cryostat
• Small transverse cavity dimension
Step 0
Step 1
Step 2
demonstrator (1 cavity)
demonstrator (2 cavities)
advanced demonstrator (5 cavities)
2016 2019 2015
Step 0: CW-LINAC Demonstrator @ GSI
High Charge State Injector (existing)
Beam line (ready)
delivery
@summer 2015
LHe infrastructure
(partially ready)
sc solenoids (9.3 T)
CH cavity
cryostat
delivery
@summer 2015
Step 1&2: Advanced Demonstrator @ GSI
Step 1
(2016)
Step 2
(2019)
• Test of combination of two cavities
• Advanced demonstrator allows first experiment at coulomb barrier
Quality Factor Q vs Ea
for CH-Prototype@325MHz
• Ea =14 MV/m @ 2K, design value Ea =5 MV/m
• Annealing @800 K against Hydrogen contamination is
planned
• Design parameters are achieved. Proof of principle!
b 0.155
Frequency (MHz) 325.224
Cells 7
Length bl-def (mm) 505
Diameter (mm) 350
Ea (MV/m) 5
Ep/Ea 5.1
Bp/Ea [mT/(MV/m)] 13
CH-Cavity for Demonstrator @ 216.8 MHz
b 0.059
Frequency 216.816 MHz
Cells 15
Length bl-def (mm) 691
Diameter (mm) 409
Cell length 40.82
Ea (MV/m) 5.1
Bp/ Ea 5.2
Helium vessel
Helium in
Tuner flange Helium out
Dynamic
bellow
tuner
Production @ RI
delivery summer 2015
• Lower b lower frequency 2 x 108.408 MHz =216.816 MHz
• R&D on cavity, RF-couplers, bellow tuners
Cavity Production@RI (Bergisch Gladbach)
cavity inside rf-coupler flanges
bellow tuner cavity with end caps
Summary and Outlook II
HLI
Advanced Demonstrator Design
CH1 CH2 CH3 CH4 CH5
1 cryomodul
rebuncher
High Charge State-
Injektor
1.4 AMeV
Optimized Demonstrator Design
HLI
CH0 CH1 CH2 CH3 CH4 CH5 CH6 rebuncher CH7 CH8 CH9 CH10
CH
Demonstrators 1.4 AMeV 6 AMeV (heavy ions)
6 cryomodules High Charge State-
Injektor
Accelerator Physics and Integrated Detectors
Infrastructure, SHE-LINAC, HESR-research&MORE
Critical issues for HESR cooler
Critical and unresolved issues for 4.5-8MV and 1-3 A
- Power generation on terminal/solenoids in HV region
- Beam diagnostics and control
- Recuperation efficiency
Design work from Uppsala University (2009) based on
Research by Budker Institute for nuclear physics,
Novosibirsk (BINP)
HIM ACID adresses these issues by
- Cooler test stand
- R&D concerning power generation
Investigation of critical cooler issues at HIM/KPH:
2m
Collector
(+5kV, 1A)
Solenoid
with integ.
Wien filter
Solenoids
Beamline
(+26KV)
Gun (0KV)
Accelerator Physics and Integrated Detectors
Cooler R&D Highlights-I : Collector efficiency
HIM PhD student Max Bruker
with „his“ Cooler Test-stand
located in improvised laboratory in KPH
Selected results
-long term stable operation with
magnetized beam and decelleration
to very low collector potentials
- Demonstration of effective capture
of backstreaming electrons from collector,
- Very high capture efficiency leading
to ultra-low effective collector losses
(<10-6) for HESR cooler can be expected
- and will be demostrated in the near future
- Thesis can be finished in 2015
Accelerator Physics and Integrated Detectors
Cooler R&D Highlights-II: Thomson diagnostics
Thomson Laser experiment:
(PhD work Tobias Weilbach)
- Experiment now ready for data taking
- 300kW (peak) laser superimposed with 30mA (peak) electron beam
20ns pulse length, 100 kHz reprate
- Measured Laser background on PMT in 20cm distance from
primary beam (almost 1021 photons/s, 3*1014 e/s) is only 600 Hz . Expected signal 30Hz.
- Many orders of magnitude better S/N possible at real cooler
-PhD thesis can be completed 2015
Accelerator Physics and Integrated Detectors
Cooler R&D Highlights-III: Turbine powering
~40cm
Turbine runs as foreseen (5kW to load, enough to power 1/5
of all soelnoids of HESR cooler)
(but teething problems: first attempt stopped after 80 hours
Fabrication Quality control problem, not considered severe
air bearing turbine development ordered (1/2015)
SF6 optimized turbine ordered (1/2015)
ORC development project with U-Bayreuth started in 1/2015
2014: BINP Prototype for 700kV Stage
- BINP will make study for this device and its
possible extensions
- Protoype device in existing pressure vessel at BINP
- 5kW turbogen will be supplied by HIM
- Turbogen drives CT
- ± 30kV generated by CT stages + power on stage
- 12 Stages
- Reliability and perfomance tests of turbogen.
also at HIM
We believe that this scheme
is scalable Drawing: V. Reva, BINP
• Accelerator Physics and Integrated
Detectors: SUMMARY Projects up& running with promising first
results
• Will become far more productive as soon as
infrastructure becomes available in 2016
• Accelerator Physics and Integrated
Detectors
THANK YOU FOR YOUR ATTENTION!
Backup
Accelerator Physics and Integrated Detectors
Personal, Infrastructure, Projects, & Roadmaps to 2018
ACID-HESR (Cooler):
Acid Section Head:
JGU Prof W3 Kurt Aulenbacher
Co-Section Head
GSI Section leader Winfried Barth
ACID-SHE Linac:
Objective 2018:
Solve open issues for
8MV HESR cooler
Objective 2018:
From demonstrator to working
multi cavity system
28 GHz-ECR ion source
RF injection
side
Beam extraction
side
GOAL:
- Higher Charge State higher energy gain
- Higher Charge State higher beam intensity without stripping
- Higher heavy ion beam intensity cw-/ pulse-mode operation
- Compact accelerator lower cost
ECR-projects/developments for heavy ion application:
- VENUS (LBNL)
- SERSE (INFN)
- SUSI (NSCL/MSU) -> FRIB (U33+/34+)
- MS-ECRIS@RIKEN (U35+)
- SECRAL (IMP-HIRFL) (U41+)
Bead pull measurements of the Field Profile
• Field profile is flat within 5% except the end gaps
Measured frequency changes
(1) Cavity without static tuners and tentative attached end caps
(2) Static tuners #1, #4, #6, #7 welded into the cavity
at 56 mm tuner height
(3) Left end cap welded to the cavity
(4) Static tuners #2, #8, #9 welded into the cavity
at 65 mm tuner height
(5) Right end cap welded to the cavity
(6) 50 µm BCP treatment
(7) Static tuners #3, #5 welded into the cavity
at 68 mm tuner height
(8) 25 µm BCP treatment
(9) 25 µm BCP treatment (optional)
(10) HPR
• Cold tests of the cavity @ IAP Frankfurt is
planned on April 2015
• Next step: welding of the He-vessel
Support Frame@CRYOGENIC (U.K.)
sc solenoid I
sc solenoid II
CH cavity
warm-cold-
transitionI
cold-warm-transitionI
Summary and Outlook
• Prototype of superconducting CH-cavity@325 MHz achieves design values
• Delivery of working CH-cavity @ 217 MHz is scheduled at 3 quarter of 2015
• Infrastructure @ GSI is almost ready
• Design of “short” CH-cavity
• Advantage:
simpler geometry without the girder lower production cost
simpler beam dynamics
• Disadvantage: poor field flatness lower energy gain
• Call for tender is ended, planned delivery @ end of 2016
• During the filling with LN2 occurred vacuum leakage due to temporary sealing
• Not whole cavity was covered with LN2
• The measured frequency shift is comparable to expectation
• The measurement allows extrapolation of resonance frequency @ 4K
Thermal shrinkage tested with LN2: Results
Temperature during the cool down Measured frequency shift
Thermal shrinkage tested with LN2@RI
• Frequency measurement @77K before welding of 2 last static tuners
2015-2018 Planned investments
Year Partner/purpose Amount k€
2015/16 Bayreuth:
ORC layout
180
2015-2017 BINP
600kV turbine
driven test-stage
~300
2015-2016 Air bearing
turbine
SF-6 optimized
300
2017-2018 Test stage with 3A
beam
200
Advanced R&D inside Accelerator Research&Development (HGF Program)
ARD-Folie
The power-problem: The 2MV device at Jülich
Each section contains;
- high-voltage power supply +/- 30 kV;
- power supply of the coils of the
magnetic field (2.5 A, 500 G);
- section of the cascade transformer for
powering of all electronic components;
33 high-voltage section V. V. Parchomchuk:
For higher voltages the Cascade transformer
will become inconvenient-unsuitable (Lossy&bulky)
Initially, a different solution was foreseen
Turbines as solution to the power-problem
Up to 2009: Different concept:
Power generation by gas-turbines
Abandoned due to unreliable turbines…..
Industrialiszation required. But:
Commercial market for small scale
turbogenerators was non-existent at that
time
12*700 kV device….(Drawing by V. Reva)
Open issue: industrialization of turbogens, SF6 operation and energy consumption (1MW for real cooler), enormous
space required for compressor Will be addressed by the ORC (Organic Rankine Cycle) project
Goal. 2015-2018 turbine powered multi MV generator
5kW Turbine Compressor for 5kW Turbine
Some important facts:
-Full concept will need ~1MW el.
Energy to generate 150kW floating power
- oper ation with SF6 desirable (required?)
- DEPRAG/ FH Amberg (summer 2013) :
Further R&D is interesting only
if related to “Energiewende issues”
2015-2016 The ORC study
-ORC is a method to gain electrical energy from
low temperature heat ( low Carnot efficiency)
- SF6 is a suitable ORC medium
- Low temperature heat 80-90 C is potentially
available at FAIR (exhaust Cryocompressors!)
ORC test stand at U-Bayreuth with 15kW DEPRAG turbogenerator
(heat generator order of magnitude smaller than compressor)
Strategic advantages:
- Promises dramatically reduced power requirement from HESR cooler
- Turbine competence from DEPRAG & FH Amberg may stay attached to our project
HIM prepares MOU with U-Bayreuth.
Bayreuth will investigate & plan the components and system layout
for a SF6 based ORC process at the turbine cooler