K.U.Leuven LPC-Caen GSI Jyväskylä Univ. CERN-ISOLDE Krakow Jagell.Univ. Univ. Mainz

EURONS PCC Meeting, Groningen, 11-12 December 2006Nathal Severijns, JRA-11 TRAPSPEC

TRAPSPECJRA-11

JRA-11 (TRAPSPEC) Improvements and developments of

ion traps, spectrometers and detectors forlow-energy nuclear physics experiments

K.U.Leuven

LPC-Caen

GSI

Jyväskylä Univ.

CERN-ISOLDE

Krakow Jagell.Univ.

Univ. Mainz

RMKI-Budapest (ass.)


TRAPSPECJRA-11

Design and development of multi-purpose set-ups for precision decay spectroscopy in ion traps

-particles and CE electrons: Si, MCP, wire chamber

recoil ions: MCP detector, channeltron with CDEM

Design and development of new trap configurations

cryogenic Penning trap - superheavy elements - doubly and triply charged ions

measurements on daughter isotopes of those originally trapped

system to monitor phase space of trapped ion cloud


TRAPSPECJRA-11

Performance enhancement of Penning-trap experiments by using dedicated new electron- and

ion sourceselectron & ion sources: - reference masses

- study of systematic effects - off-line studies

Retardation spectrometers for recoil-ion spectroscopy for trap-assisted beta-neutrino correlation measurements

-decay of exotic ions

neutron -decay


TRAPSPECJRA-11

Task T-J11-2: Extended Paul trap set-up at SPIRAL-GANIL (LPC-Caen)

sched. realiz. remarkChamber arrangement defined and fixed 12/0504/08

Detectors defined and built 06/07

Ion cloud monitoring system ready 09/07

-recoil coincidences from decays in Paul trap 12/08 05/05 *

- 2005, 2006: > 105 beta-ion coincidences

- planning modified

- all milestones will be realized in time


TRAPSPECJRA-11

6He-recoil coincidences

LPC-Caen

V-A theory


TRAPSPECJRA-11

Task T-J11-3: Improved set-up for SHIPTRAP (SHIPTRAP-GSI) sched. realiz. remark

Detector concept for in-trap decay ready 12/0512/06

Test of cryogenic Penning trap system 12/06

DAQ and control system ready 06/07

First measurements 12/08

- some delay due to problems to find postdoc; solved as of 01/07

- steady progress; milestones not at stake

- 52 masses (17 new; accuracy 5 x 10-8)


TRAPSPECJRA-11

SHIPTRAP-GSI

cryogenic trap test set-up


TRAPSPECJRA-11

Task T-J11-4: New detector and in-trap mass spectrometry with ISOLTRAP (CERN-ISOLDE)

sched. realiz. remark

Test set-up for CDEM 09/05 08/05

Software development 03/06 01/06

Test CDEM 12/06 05/06 *

Mass spectrometry 12/08 08/06 *

- all milestones realized

- detection efficiency improved by factor ~3

- masses of A = 61-63 Fe nuclides (not produced at ISOLDE)


TRAPSPECJRA-11ISOLTRAP/CERN-ISOLDE


TRAPSPECJRA-11

Task T-J11-5:

In-trap spectrosc. & high-resol. mass spectrom. with JYFLTRAP (Jyväskylä Univ.) sched.realiz. remark

Data acquisition operational 03/06 80%

New trap available 12/07 06/06 *

Results of multiply charged ions study 12/06 60%

First measurements with upgraded system 12/07 09/06 *- 1st version of DAQ succesfully tested; being improved

- tests with doubly-charged ions already performed

- preparations for higher charge states in progress

- 110 masses measured (accuracy up to 8 x 10-9)


TRAPSPECJRA-11Jyväskylä Univ.

in-trap CE spectrum

new decay scheme


TRAPSPECJRA-11

Task T-J11-6:

Electron tracking detector for beta-decay experiments (UJ-Krakow) sched. realiz.remark

Concept of prototype available 12/05 12/05

Prototype operational 12/08

Readout and DAQ system available 12/08

- MWDC operating at P>0.3 bar

- ~ linear response (tdrift vs. pos.)

- spatial resolution ~1.5 mm

- detector for LPC-Caen in progress


TRAPSPECJRA-11

MWDC detector

90Sr source

scintillator

PMT

UJ-Krakow

Test set-up


TRAPSPECJRA-11

Task T-J11-7:

Detector development for WITCH (KU-Leuven)


Operation of MCP+pin diodes in high B-field 06/06 12/06

Normalization for recoil ion counting 12/05 12/07

Measurement of recoil ion energy spectrum 12/06 11/06

Detector set-up for beta-spectroscopy 12/08

- tests of MCP finished; Si pin diode ongoing

- new concept for normalization (scintillator i.s.o. Si pin diodes)

- first recoil ion spectrum measured (normalization via t1/2)

- Geant-4 code for simulation of beta-spectra available


TRAPSPECJRA-11KU-Leuven

124In recoil spectrum

MCP in magnetic field

124In recoil spectrum

39K

39K


TRAPSPECJRA-11

Task T-J11-1 & 8:

Neutron decay retardation spectrom. + simulations and calculations (U-Mainz; Budapest)


Design calculations finished 12/06 12/05 *

Systematic effects understood 06/08

Data analysis under control 12/08

Spectrometer tested 12/05 10/05

Electron source (replaced by He source) 06/06 09/07

System tested and operational 03/08

First experiment 12/08


TRAPSPECJRA-11

U-Mainz; Budapest

magneticshielding

proton detector


TRAPSPECJRA-11

JRA-11 (TRAPSPEC) Improvements and developments of

ion traps, spectrometers and detectors forlow-energy nuclear physics experiments

Objectives:

1. perform in-trap spectroscopic studies of rare isotopes

2. improve the capabilities, precision and sensitivity of existing trap set-ups

3. perform precise recoil ion spectroscopy

by:

- development of multi-purpose set-ups for precision decay spectroscopy experiments in ion traps,

- development of new trap configurations to house large solid angle detection set-ups,

- enhancing the performance of experiments by using dedicated new electron- and ion sources,

- development of retardation spectrometers for high-resolution recoil-ion spectroscopy for trap-assisted - correlation measurements.


TRAPSPECJRA-11

Description of work: Task T-J11-1: Simulations and calculations (RMKI-Budapest) Subtask T-J11-1.1: Design-optimization Subtask T-J11-1.2: Systematic effects Subtask T-J11-1.3: Data analysis Task T-J11-2: Extended Paul trap set-up at SPIRAL-GANIL (LPC-Caen) Subtask T-J11-2.1: Detection chamber Subtask T-J11-2.2: Detector developments

Subtask T-J11-2.3: Monitoring ion cloud Subtask T-J11-2.4: Test and operation Task T-J11-3: Improved set-up for SHIPTRAP (GSI) Subtask T-J11-3.1: Detector for in-trap decay Subtask T-J11-3.2: Cryogenic Penning trap

Subtask T-J11-3.3: Control system Subtask T-J11-3.4: Test and measurements

Task-T_J11-4: New detector and in-trap mass spectrometry with ISOLTRAP (CERN-ISOLDE)

Subtask T-J11-4.1: Test set-up for CDEM Subtask T-J11-4.2: Software development Subtask T-J11-4.3: Test CDEM Subtask T-J11-4.4: Mass spectrometry


TRAPSPECJRA-11

Description of work: Task-T_J11-5: In-trap spectroscopy & high-resolution mass spectrometry with JYFLTRAP (Jyväskylä Univ.)

Subtask T-J11-5.1: DAQ Subtask T-J11-5.2: Trap geometry Subtask T-J11-5.3: Multiply-charged ions Subtask T-J11-5.4: High-resolution mass spectrometry

Task-T_J11-6: Electron tracking detector for beta-decay experiments (UJ-Krakow) Subtask T-J11-6.1: Electron tracking Subtask T-J11-6.2: Prototype design Subtask T-J11-6.3: Electronics and DAQ Task-T_J11-7: Detector development for WITCH (KU-Leuven) Subtask T-J11-7.1: Detector performance in high magnetic field Subtask T-J11-7.2: Normalization beta detectors Subtask T-J11-7.3: Si detectors Task-T_J11-8: Neutron decay retardation spectrometer (U-Mainz) Subtask T-J11-8.1: Retardation spectrometer Subtask T-J11-8.2: Electron source Subtask T-J11-8.3: Optimization Subtask T-J11-8.4: Beam time


TRAPSPECJRA-11

Milestones: Short title Due date Date

accompl. Remark

Simulations and calculations

M-J11-1.1 Design calculations finished 12/06 12/05

M-J11-1.2 Systematic effects understood 06/08

M-J11-1.3 Data analysis under control 12/08

Extended Paul trap set-up at SPIRAL-GANIL

M-J11-2.1 Chamber arrangement defined and fixed 12/05 planned 04/08

M-J11-2.2 Detectors defined and built 06/07

M-J11-2.3 Ion cloud monitoring system specified and built 09/07

M-J11-2.4 Coincidences measured from decays in Paul trap 12/08 05/05 *

Improved set-up for SHIPTRAP

M-J11-3.1 Detector concept ready 12/05 planned 12/06

M-J11-3.2 Test of trap system possible 12/06

M-J11-3.3 Data acquisition and control system ready 06/07

M-J11-3.4 First measurement with new set-up 12/08

New detector and in-trap mass spectrometry with ISOLTRAP

M-J11-4.1 Test of electronics and vacuum system 09/05 08/05

M-J11-4.2 Test of software 03/06 01/06

M-J11-4.3 Test and specification of the CDEM 12/06 05/06

M-J11-4.4 Specification of the in-trap decay method 12/08 08/06 *


TRAPSPECJRA-11

Milestones: Short title Due date Date

accompl. Remark

In-trap spectrosc. & high-resolution mass spectrom. with JYFLTRAP

M-J11-5.1 Data acquisition operational 03/06 80%

M-J11-5.2 New trap available 12/07 06/06 *

M-J11-5.3 Results of multiply charged ion study available 12/06 60%

M-J11-5.4 First measurements with upgraded system 12/07 09/06 *

Electron tracking detector for beta-decay experiments

M-J11-6.1 Concept of prototype available 12/05 12/05

M-J11-6.2 Prototype operational 12/08

M-J11-6.3 Readout and DAQ system available 12/08 Detector development for WITCH M-J11-7.1 Normal operation of MCP and pin diodes in high magnetic

field 06/06 50%;

planned 12/06 M-J11-7.2 Normalization for recoil ion counting available

Measurement of recoil ion energy spectrum 12/05 12/06

11/06

planned 12/07

M-J11-7.3 Detector set-up for beta-spectroscopy operational 12/08

Neutron decay retardation spectrometer

M-J11-8.1 Spectrometer tested 12/05 10/05

M-J11-8.2 Electron source operational 06/06 planned 09/07

M-J11-8.3 System tested and operational 03/08

M-J11-8.4 First experiment 12/08

K.U.Leuven LPC-Caen GSI Jyväskylä Univ. CERN-ISOLDE Krakow Jagell.Univ. Univ. Mainz

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