1. Precision Measurements of Very-Short Lived Nuclei
MATS
Precision Measurements
of Very-Short Lived Nuclei
Using an Advances Trapping System
for Highly-Charged Ions
Preparation
Penning trap
Mass Analyzer
Precision
Time-of-flight
detector c Q
TOF
EBIT
RFQ n
Ion production
FRS Low
Energy Branch
Beam bunching
Charge breeding
q / A - selection
Cooling process
Mass measurement
Detection

2. trap assisted nuclear spectroscopy
MATS – Ion Trapping:
effective use of rare species
extended observation & interaction time
high quality q/m selection
manipulation of charged particles at low E
accumulation & bunching
charge breeding
polarization
EFFICIENCY
ACCURACY
SENSITIVITY
Mass measurements and
trap assisted nuclear spectroscopy

3. Setup Typical ion parameters out of gas-filled RFQ’s
Detectors:
FT-ICR
TOF-ICR
Si(Li) electron
3.0m
Precision trap:
mass measure-
ments
Cooler trap:
beam preparation
spectroscopy
Magn. deflector:
q/m separation
3.0m
Typical ion parameters out of gas-filled RFQ’s
transversal emittance < 10 Pi mm 3 keV
longitudinal emittance < 4 ms eV
Buffergas: He (hard to cool everything below A = 10)
cooling time constant (bunch forming time): 1 ms
What is the emittance longitudinal/transversal?
What are the vacuum requirements?
Magnetic M/q Separation
to select a single charge state
required resolving power R ~ 300
Is electron cooling working at these conditions?
Do we want a separate magnet for this?
Might we even be able to cool already in the EBIT?
EBIT:
charge breeding

4. MATS – Experiments with Exotic Nuclei
Detectors:
FT-ICR
TOF-ICR
Si(Li) electron
T1/2 ...
Mass
3.0m
Precision trap:
mass measure-
ments
Laser Spectroscopy
Cooler trap:
beam preparation
& spectroscopy
Magn. deflector:
q/m separation
3.0m
Typical ion parameters out of gas-filled RFQ’s
transversal emittance < 10 Pi mm 3 keV
longitudinal emittance < 4 ms eV
Buffergas: He (hard to cool everything below A = 10)
cooling time constant (bunch forming time): 1 ms
What is the emittance longitudinal/transversal?
What are the vacuum requirements?
Magnetic M/q Separation
to select a single charge state
required resolving power R ~ 300
Is electron cooling working at these conditions?
Do we want a separate magnet for this?
Might we even be able to cool already in the EBIT?
EBIT:
charge breeding
X- ray Spectroscopy
In-Trap Spectroscopy

5. MATS will be an advanced trapping system for mass spectrometry, laser
Summary
Preparation
Precision
RFQ
EBIT
Mass Analyzer
Penning trap
Penning trap
Design parameters:
Overall efficiency 1-5%
Maximum resolving power 108
Accessable half-life 10 ms
Relative mass uncertainty 10-9
Organisation and responsibilities
Mainz, Greifswald, Jyväskylä, Stockholm: Penning trap system
GSI, Munich, Huelva: RFQ cooler and buncher
Heidelberg, GSI, Livermore, Seattle: EBIT
Giessen, Mainz, Orsay: Detection system and electronics
Mainz, Munich: Trap assisted spectroscopy
MOU prepared – to be signed
Simulations ongoing
MATS will be an advanced trapping system for mass spectrometry, laser
spectroscopy, and in-trap decay spectroscopy with highly-charged, short-lived ions.