R. Ringle, 16/03/21, Slide 1 LEBIT: Present status Ryan Ringle National Superconducting Cyclotron Lab Michigan State University.

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Presentation transcript:

R. Ringle, 16/03/21, Slide 1 LEBIT: Present status Ryan Ringle National Superconducting Cyclotron Lab Michigan State University

R. Ringle, 16/03/21, Slide 2 Outline The Low Energy Beam and Ion Trap (LEBIT) facility Recent status of LEBIT New LEBIT developments LEBIT CS Software –Mass Measure –Eva

R. Ringle, 16/03/21, Slide 3 TITAN, TRIUMF ISOL CPT, ARGONNE 252 Cf fission fragments LEBIT, NSCL Projectile Fragmentation JYFLTRAP, Jyvaskyla IGISOL TRIGA-TRAP, MPI Nuclear reactor fission products SHIPTRAP, GSI Superheavy Elements ISOLTRAP, ISOLDE/CERN ISOL 3 Penning Traps for Mass Measurements of Rare Isotopes

R. Ringle, 16/03/21, Slide 4 Make best use of advantages of projectile fragmentation … Fast, universal, far reach from the valley of beta-stability … and of precision experimental techniques developed for low-energy beams Low-Energy “Thermalized” Beams from Projectile Fragmentation 1 cm ~ 100 MeV/u ~ 1 eV Low-energy experiments 1 cm Gas stopping Precision atomic mass measurements Nuclear properties from atomic spectroscopy Reaction and nuclear structure studies with reaccelerated beams LEBIT 100 MeV/u 1 eV Wide interest: FAIR/GSI RIBF/RIKEN FRIB

R. Ringle, 16/03/21, Slide 5 EBIT ReA3 LINAC Gas Stopping Vault STOPPED BEAM AREA -Upgrade of gas stopping -New stopped beam area for LEBIT – Mass measurements BECOLA – Laser spectroscopy - Re-accelerated beams LEBIT Beam from A1900 REACCELERATED BEAM AREA NSCL Moves Forward - Preparing for FRIB LEBIT success motivated expansion of stopped beam program and implementation of reacceleration BECOLA

R. Ringle, 16/03/21, Slide 6 Mass measurements near the dripline Superallowed  decay Q-value Neutron shell closure at N=40 near Z=28 Recent LEBIT Online Results 72 Br : Valverde, et al., PRC (2015) 14 O : Valverde, et al., PRL (2015) 11 C : Gulyuz, et al., PRL 116, (2016) 21 Na : Eibach, et al., PRC 92, (2016) 68 Co : under analysis 72m,g Br +, T 1/2 =1.3 m, 10.6 s 14 O +, T 1/2 =71 s  m = 25 eV  m/m = 2· C +, T 1/2 =20 m 243 ions 21 Na +, T 1/2 =22.5 s T=1/2 mirror decay Q-values 68m Co +2, T 1/2 =1.3 s

R. Ringle, 16/03/21, Slide 7 In-trap purification Step 1: TOF gate limits isobars in Penning trap Step 2: Identify each contaminant and clean with a dipole excitation (6 dedicated AFG’s) No separate purification trap at LEBIT! ~700 species identified - Resolving power ~ Can selectively target any known contaminant ion - Need to identify each contaminant during beam time (not optimal!) + +

R. Ringle, 16/03/21, Slide 8 SWIFT (Stored Waveform Inverse Fourier Transform) Frequency domain signal ion of interest Inverse Fourier Transform Fast (20 – 50 ms) Same excitation scheme for all ions Requires high-precision AFG + amplifier Should be integrated into CS and MM8 Implement SWIFT Technique used in FT-ICR S.Guan and A.G.Marshall, IJMS Ion Proc. 5, 157/158 (1996) Time domain signal

R. Ringle, 16/03/21, Slide 9 Simultaneously Trapped N 2 + and CO + SWIFT Cleaning of CO + SWIFT Cleaning of N 2 + A. A. Kwiatkowski, et. al., Int. J. Mass Spectrom. (2014). SWIFT at LEBIT Essential for mass measurements – finally under real conditions

R. Ringle, 16/03/21, Slide 10 rp-process r-process Single Ion Penning Trap Mass Spectrometry (PTMS) of Rare Isotopes Synthesis of elements Doubly magic nuclei and their vicinity 78 Ni & 100 Sn and neighboring isotopes important for nuclear structure studies and nuclear model tests Mass measurements are challenging due to low production rates Production at NSCL: 1-3 per day FRIB will allow mass measurements further away Towards High-Sensitivity Mass Measurements far from Stability SIPT project at LEBIT: measure masses of exotic isotopes with very low production rates

R. Ringle, 16/03/21, Slide 11 superconducting LCR circuit analysis detection electrodes pre-amp Perform measurements on the most exotic rare isotopes produced by NSCL and later, FRIB Access to isotopes delivered at rates as low as 1 ion/day Size of Nuclear Structure Effects is typically > 100keV (  m/m=10 -6 for 100 Sn) High-precision mass measurements using a single ion with SIPT CS+MM8?

R. Ringle, 16/03/21, Slide 12 Single Ion Penning Trap (SIPT) at LEBIT All fabrication complete February 2016 Installation complete up to 7T solenoid Commissioning to be completed early Fall 2016

SIPT - CS feature requests  Stanford research SR1 Audio Analyzer Is also used at TRIGA-TRAP and the g-factor experiments  This device can be used for CS tests  Integrate with MM?  Low noise Voltage Supply HV50-16  Low Noise HV Source HV neg  Low Noise HV Steerer Supply Done!

R. Ringle, 16/03/21, Slide 14 CS at LEBIT (before Sept. 2013) Client PC’s LEBIT control panels MM8 parameter scan and acquisition Qt Dim Monitor dim variable monitoring and plotting OPC interface OPC server and LabVIEW tag engine PC2 (LV 7.1) PC1 (LV 8.2) LEBIT Server Server PC’s Hardware Devices PLC System

R. Ringle, 16/03/21, Slide 15 CS at LEBIT Now Client PC’s LEBIT control panels MM8 parameter scan and acquisition Qt Dim Monitor dim variable monitoring and plotting OPC interface OPC server and LabVIEW Shared Variables LEBIT Server Server PC LV 2012 on Win 7 Hardware Devices PLC System

R. Ringle, 16/03/21, Slide 16 LEBIT Control Panels used to display and change DIM variables Written in Qt 5 using C++ dim interface

R. Ringle, 16/03/21, Slide 17 Mass Measure (MM8) MM8 ported to Qt 5 – tested on OSX & Windows Scripting capabilites – tested with Python Some minor visual bugs, but fully functional Future functionality – FT-ICR, PI-ICR, SWIFT? Download at

R. Ringle, 16/03/21, Slide 18 Eva What is new? General purpose TOF-ICR analysis Eva 8 based on Qt 5.4 – tested on OSX & Windows 7/8 Multiple fit functionality and no-doubles function Important bugfix: start and end time in.ft2 and.log file were the same Future functionality – PI-ICR? Please approach me for feature requests and bug reports.

R. Ringle, 16/03/21, Slide 19 LEBIT has been very busy over the past year with online measurements and technical developments CS is an integral component of the LEBIT facility Future CS support of FT-ICR, PI-ICR, and SWIFT would be great MM8 and Eva will be updated to support new functionality and requests Summary

R. Ringle, 16/03/21, Slide 20 Big thanks to… Dennis and Holger for their continued development of CS

R. Ringle, 16/03/21, Slide 21 LEBIT Team G. Bollen, M. Eibach,K. Gulyuz, C. Izzo, R. Ringle, R. Sandler, S. Schwarz, A. Valverde Collaborators: M. Brodeur, D.J. Morrissey, M. Redshaw, C.S. Sumithrarachchi