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MATS/LaSpec Status report

MATS/LaSpec 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 slides/material. NuSTAR Week 2011, Bucharest, October 17-21, 2011. MATS & LaSpec stands for.

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MATS/LaSpec Status report

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  1. MATS/LaSpecStatus report Alexander Herlert FAIR GmbH on 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, 2011

  2. MATS & LaSpec stands for Precise Measurements on very short-lived nuclei using an Advanced Trapping System 10 countries, 24 institutes, 87 members Laser Spectroscopy on very short-lived nuclei 8 countries, 13 institutes, 34 members

  3. MATS & LaSpec at the LEB/FAIR Laser Spectroscopy MR-TOF RFQ cooler & buncher MATS Dipole magnet EBIT 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

  4. MATS & LaSpec at the LEB/FAIR Collinear Ion Beamline: Manchester ß-NMR: Leuven Collinear Atom Beamline + Optical Pumping: Mainz RFQ: JYFL Technical Design Report of MATS & LaSpec: D. Rodriguez, K. Blaum, W. Nörtershäuser et al.EPJ Special Topics 183 (2010) 1-123

  5. 3-stage rf cooler for MATS and LaSpec He in (0.04 mbar) Drift tube & acceleration Deceleration RFQ trap QP deflector+einzel Mini RFQ Valve Valve Insulator Turbo Turbo Turbo Electrode design similar to ISCOOL • Simulation results: • Emittance ~6π mm mrad, ΔE~ 3 eV, δT ~3 ms 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

  6. Layout of the TRIGA-Spec experiment • 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)

  7. Prototyping & Development @ TRIGA-Spec Recently added: RFQ cooler and buncher (COLETTE) common beamline

  8. Status of the LASPEC Prototype at the TRIGA-Reactor in Mainz Status of the LASPEC Prototype at the TRIGA-Reactor in Mainz Titelmasterformat durch Klicken bearbeiten Laser SpHERe LaserSpectroscopy of Highly Charged Ions and Exotic Radioactive Nuclei beam diagnostics for MATS and LASPEC (MCP and imaging optics for beam profile control) build and testing D. Lunney, NIM A598 (2009) 379-387 laser spectroscopy on praseodymium (preparatory work under realistic conditions for on-line runs, e.g. at ISOLDE) successfully tested ISOLDE, CERN RFQ cooler and buncher (in preparation for on-line coupling to the reactor) currently comissioning TRIGA, Mainz

  9. Optical pumping & Conetraps • 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 LaSpec P. Reinhed et al., NIM A621 (2010) 83

  10. A new optical detection region for Collinear Laser Spectroscopy (Design: M.L. Bissell, K.U. Leuven, Belgium) Optical detection efficiency improved by factor 10 + background photon detection reduced by 50% ! Laser / K beam detected region Electron Tubes 9658B 2” PMT , S20 IR sensitive photocathode Simulated efficiency of new and previous set-up: gain ≈ 14x 100 mm Ø aspheric lenses Use refrigerant circulator FP40-MC to cool photocathode to -30C via Cu heat exchanger. Mark Bissell et al., NIM, in preparation

  11. Experimental sequence for MATS Measurement Penning trap Gas catcher RFQ buncher Preparation Penning trap MR-TOF-MS EBIT Detector trap

  12. Internal Ion Source 10-4 mbar Separated Ions 133Cs+ 12 ms TOF Ions Curved RFQs Injection Trap System 10-2 mbar Differential Pumping Section 10-6 mbar Energy Buncher Time-of-Flight Analyzer Gate Detectors Kinetic Energy 1.5 keV Ion Gate Isochronous SEM 10-8 mbar Mass Measurement Post-Analyzer Reflector Aux. Detector MR-TOF-MS (UGießen) • Mass resolving power (FWHM) • m/m =100,000 (5 ms TOF) • Isobar separationDemonstrated for C6H6 and 13C12C5H5 • (Intensity ratio 170:1, m = 4 MeV) • Ion capacity> 104 per cycle and >106 per second W. R. Plass et al

  13. Test for the LEB: MR-TOF-MS at the FRS Ion Catcher W.R. Plaß et al., GSI Scientific Report 2010, p. 137 (2011) 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)

  14. 6 keV, 2 A electron beam. Current density 1400 A/cm2, background pressure 10-10 mbar (H2), ion temperature 300 eV. The calculation includes radiative recombination and charge exchange. (EBIT at TRIUMF) J. R. Crespo et al (MPIK) EBIT (MPIK Heidelberg) • High electron current up to 2000 mA. • High ion densities: 106 to 1010 ions/cm3 (Courtesy of J.R. Crespo)

  15. Penning traps (UGW, MPIK Heidelberg, GSI, UGR) • 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) (Courtesy of J.R. Crespo)

  16. The detection in the measurement Penning trap: FT-ICR for single ion sensitivity C. Weber PhD Thesis (UM) R. Ferrer, PhD Thesis (UM) Ion detection for the Penning traps (UGR, MPIK, UGW) Detection in the preparation Penning trap • Cryogenic environment and UHV. • Broad-band mass identification Amplifier in vacuum (UGR) D. Rodríguez et al Technical drawing of the setup at UGR for FT-ICR tests J. M. Cornejo, Master thesis (UGR) Amplifier in air (UGR) Coil for single ion Detection (UGR)

  17. The Detector Trap (LMU Munich) mock-up: detector carrier boards between trap electrodes • Characteristics: • Replace inner Penning trap electrode by cubic setup of 4 Si-strip detectors • Use detector bias for trapping potential (P. Thirolf et al) Penning trap electrodes: cryotest: lN2 temperature, selection of groove dimensions strip detector • Detector dimensions given by: space in magnet bore, required position resolution, efficiency optimization • Detectors need to comply with UHV and cryogenic conditions Developments also carried out at PNPI An funding has been received

  18. Off-line ion source (PNPI) Y. Nu. Novikiov et al

  19. Funding ID (Preconstruction-MoU)

  20. Status and perspectives • FAIR will offer unique opportunities with RIB • MATS & LaSpec will incorporate the most advanced technical developments on ion traps, lasers and beam preparation • The Technical Design Report was approved in May 2010 • Several 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

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