Status report Alexander Herlert FAIR GmbH o n behalf of the MATS and LaSpec Collaborations Thanks to W Nörtershäuser D Rodríguez P Campell I Moore and G Neyens for providing slidesmaterial ID: 362942
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Slide1
MATS/LaSpecStatus report
Alexander HerlertFAIR GmbHon behalf of the MATS and LaSpec Collaborations
Thanks to W. Nörtershäuser, D. Rodríguez, P. Campell, I. Moore, and G. Neyens for providing slides/material
NuSTAR Week 2011, Bucharest, October 17-21, 2011Slide2
Precise M
easurements on very short-lived nuclei using an Advanced Trapping System
Laser Spectroscopy on very short-lived nuclei
MATS &
LaSpec
stands for
10
countries,
24 institutes
, 87 members
8
countries,
13 institutes
, 34 membersSlide3
RFQ cooler & buncher
MR-TOF
MATS
EBIT
Laser Spectroscopy
Dipole magnet
Gas cell
for more information see: Technical Design Report of MATS & LaSpec:
D. Rodriguez, K. Blaum, W. Nörtershäuser et al.EPJ Special Topics 183 (2010) 1-123
MATS &
LaSpec
at the LEB/FAIRSlide4
Technical Design Report of MATS & LaSpec:
D. Rodriguez, K. Blaum, W. Nörtershäuser et al.EPJ Special Topics 183 (2010) 1-123
RFQ: JYFL
ß-NMR: Leuven
Collinear Ion Beamline:
Manchester
Collinear Atom Beamline + Optical Pumping: Mainz
MATS &
LaSpec
at the LEB/FAIRSlide5
Turbo
Simulation results: Emittance ~6π
mm mrad, Δ
E~ 3 eV,
δ
T ~3
m
s for 2 keV pulse of ejected
133Cs
+ when using buffer gas at 80 K. 80% injection efficiency, when assuming parallel beam d=4 mm, (40 kV) before deceleration
Electrode design similar to ISCOOL
Valve
Deceleration
QP deflector
+einzel
Insulator
Turbo
Valve
Mini RFQ
RFQ trap
He in (0.04 mbar)
Drift tube & acceleration
Turbo
3-stage
rf
cooler for MATS and
LaSpecSlide6
Mass measurements have been already performed
Important work going on the ion source (helios) in order to make
practicable more elements from the californium source
K. Blaum,
W. Nörtershäuser et al (MPIK)
Layout of the TRIGA-Spec experimentSlide7
common
beamline
Recently added:
RFQ cooler and buncher
(COLETTE)
Prototyping &
Development @ TRIGA-SpecSlide8
Status of the LASPEC Prototype at the TRIGA-Reactor in Mainz
D. Lunney, NIM A598 (2009) 379-387
beam diagnostics for MATS and LASPEC
(MCP and imaging optics for beam profile control)
build and testing
laser spectroscopy on praseodymium
(preparatory work under realistic conditions for on-line runs, e.g. at ISOLDE)
successfully tested
RFQ cooler and buncher
(in preparation for on-line coupling to the reactor)
currently comissioning
ISOLDE, CERN
TRIGA,
Mainz
Titelmasterformat durch Klicken bearbeiten
Laser
SpHERe
Laser
Sp
ectroscopy of
H
ighly Charged Ions and
E
xotic
R
adioactive Nucl
e
i
Status of the LASPEC Prototype at the TRIGA-Reactor in MainzSlide9
Optical pumping & Conetraps
P. Reinhed et al., NIM A621 (2010) 83
Use intra cooler optical pumping to selectively populate desired ionic state
Greatly enhanced efficiencies and spectroscopic access to previously “impossible” elements
-Can be used in electrostatic traps which double as “energy elevators” in LaSpecSlide10
A new optical detection region for Collinear Laser Spectroscopy
Optical detection efficiency improved by factor 10 + background photon detection reduced by 50% !
100 mm Ø aspheric lenses
Electron Tubes 9658B
2” PMT , S20 IR sensitive photocathode
Laser / K beam
detected region
Simulated efficiency of new and previous set-up: gain ≈
14x
Mark Bissell et al., NIM, in preparation
(Design: M.L. Bissell, K.U. Leuven, Belgium)
Use refrigerant circulator FP40-MC to cool photocathode to -30
C
via Cu heat exchanger. Slide11
Experimental
sequence for MATSGas catcher
RFQ
buncher
MR-TOF-MS
Preparation
Penning trap
EBIT
Measurement
Penning
trap
Detector
trapSlide12
MR-TOF-MS (
UGießen)
10
-8
mbar
Kinetic Energy
1.5 keV
Curved
RFQs
Differential
Pumping
Section
Injection
Trap System
Time-of-Flight
Analyzer
10
-4
mbar
10
-2
mbar
Energy
Buncher
Ion Gate
Isochronous
SEM
Post-Analyzer
Reflector
Gate Detectors
Internal
Ion Source
10
-6
mbar
Ions
Separated
Ions
Mass Measurement
Aux. Detector
133
Cs
+
12 ms TOF
Mass resolving power
(FWHM)
m/
m
=
1
00,000
(
5 ms TOF
)
Isobar separation
Demonstrated for C
6
H
6
and
13
C
12
C
5
H
5
(Intensity ratio 170:1,
m = 4 MeV)
Ion capacity
> 10
4
per cycle and >10
6
per second
W. R. Plass et alSlide13
Test for the LEB: MR-TOF-MS at the FRS Ion Catcher
MR-TOF-MS was commissioned successfully at the FRS Ion Catcher in the S411 experiment (07.10. - 12.10.2011)!
(See talk by H. Geissel)
W.R. Plaß et al., GSI Scientific Report 2010, p. 137 (2011)Slide14
High electron current up to 2000 mA.
High ion densities: 106 to 1010 ions/cm3
6 keV, 2 A electron beam. Current density 1400 A/cm
2
, background pressure 10
-10
mbar (H
2
), ion temperature 300 eV. The calculation includes radiative recombination and charge exchange.
EBIT (MPIK Heidelberg)
(Courtesy of J.R. Crespo)
(EBIT at TRIUMF)
J. R. Crespo et al (MPIK)Slide15
Penning traps (UGW, MPIK Heidelberg, GSI, UGR
)
(Courtesy of J.R. Crespo)
Study of the injection of ions into the field of a 12 T Magnet (UGW)
Design of an alignment support for the trap (UGW)
(Superconducting magnet at UGW )
(L. Schweikhard, G. Marx et al)Slide16
Ion detection for the Penning traps (UGR, MPIK, UGW)
Cryogenic environment and UHV.Broad-band mass identification
Detection in the preparation Penning trap
The detection in the measurement
Penning trap:
FT-ICR for single ion sensitivity
C. Weber
PhD Thesis (UM)
R. Ferrer, PhD Thesis (UM)
Amplifier in vacuum (UGR)
D. Rodríguez et al
Amplifier in air (UGR)
Coil for single ion
D
etection
(UGR)
Technical drawing of the setup at UGR for FT-ICR tests
J. M. Cornejo, Master thesis (UGR)Slide17
The
Detector Trap (LMU Munich)
mock-
up:
detector
carrier boards
between trap
electrodes
cryotest
:
lN
2
temperature, selection
of groove dimensions
Characteristics:
Replace
inner Penning trap electrode by cubic setup of
4
Si-strip detectors
U
se
detector bias for trapping potential
Penning trap
electrodes
:
D
etector
dimensions given by: space in magnet bore,
required position resolution
, efficiency
optimization
D
etectors
need to comply with UHV and cryogenic conditions
strip detector
(P. Thirolf et al)
Developments also carried out at PNPI
A
n funding has been receivedSlide18
Off-line ion source (PNPI)
Y. Nu. N
ovikiov et alSlide19
Funding ID (Preconstruction-MoU)Slide20
Status and perspectives
FAIR will offer unique opportunities with RIBMATS & LaSpec will incorporate the most advanced technical developments on ion traps, lasers and beam preparation
The Technical Design Report was approved in May 2010Several groups have received funding to start the construction of the different components
A large number of laser and Penning trap setups at different European institutes, universities and RIB facilities can be used for developing very advanced components (MPI-K, JYFL, ISOLDE, KVI, GSI, TRIGA, UGR, UGW, UG, SPIRAL2...)
MATS can be tested and can be ready before FAIR is in operation
Unfortunately, the first stage of the modularized start version of FAIR does not include the low energy beam line where MATS & LaSpec will be placed