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Title: A field programmable gate array-based time-resolved scaler for collinear laser spectroscopy with bunched radioactive potassium beams

Abstract

A new data acquisition system including a Field Programmable Gate Array (FPGA) based time-resolved scaler was developed for laser-induced fluorescence and beam bunch coincidence measurements. The FPGA scaler was tested in a collinear laser-spectroscopy experiment on radioactive {sup 37}K at the BEam COoler and LAser spectroscopy (BECOLA) facility at the National Superconducting Cyclotron Laboratory at Michigan State University. A 1.29 μs bunch width from the buncher and a bunch repetition rate of 2.5 Hz led to a background suppression factor of 3.1 × 10{sup 5} in resonant photon detection measurements. The hyperfine structure of {sup 37}K and its isotope shift relative to the stable {sup 39}K were determined using 5 × 10{sup 4} s{sup −1} {sup 37}K ions injected into the BECOLA beam line. The obtained hyperfine coupling constants A({sup 2}S{sub 1/2}) = 120.3(1.4) MHz, A({sup 2}P{sub 1/2}) = 15.2(1.1) MHz, and A({sup 2}P{sub 3/2}) = 1.4(8) MHz, and the isotope shift δν{sup 39,} {sup 37} = −264(3) MHz are consistent with the previously determined values, where available.

Authors:
; ; ; ; ; ; ;  [1]; ; ; ; ; ;  [1];  [2]; ; ; ;  [1];  [2]
  1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22314449
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAM BUNCHING; BEAM COOLING; BEAMS; COINCIDENCE METHODS; DATA ACQUISITION SYSTEMS; DETECTION; FLUORESCENCE; HYPERFINE STRUCTURE; LASER SPECTROSCOPY; MHZ RANGE; POTASSIUM; POTASSIUM 37; POTASSIUM 39; SCALERS; SUPERCONDUCTING CYCLOTRONS; TIME RESOLUTION

Citation Formats

Rossi, D. M., E-mail: rossi@nscl.msu.edu, Davis, M., Ringle, R., Rodriguez, J. A., Ryder, C. A., Schwarz, S., Sumithrarachchi, C., Zhao, S., Minamisono, K., E-mail: minamiso@nscl.msu.edu, Barquest, B. R., Bollen, G., Hughes, M., Strum, R., Tarazona, D., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Cooper, K., Hammerton, K., Mantica, P. F., Morrissey, D. J., and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824. A field programmable gate array-based time-resolved scaler for collinear laser spectroscopy with bunched radioactive potassium beams. United States: N. p., 2014. Web. doi:10.1063/1.4895461.
Rossi, D. M., E-mail: rossi@nscl.msu.edu, Davis, M., Ringle, R., Rodriguez, J. A., Ryder, C. A., Schwarz, S., Sumithrarachchi, C., Zhao, S., Minamisono, K., E-mail: minamiso@nscl.msu.edu, Barquest, B. R., Bollen, G., Hughes, M., Strum, R., Tarazona, D., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Cooper, K., Hammerton, K., Mantica, P. F., Morrissey, D. J., & Department of Chemistry, Michigan State University, East Lansing, Michigan 48824. A field programmable gate array-based time-resolved scaler for collinear laser spectroscopy with bunched radioactive potassium beams. United States. doi:10.1063/1.4895461.
Rossi, D. M., E-mail: rossi@nscl.msu.edu, Davis, M., Ringle, R., Rodriguez, J. A., Ryder, C. A., Schwarz, S., Sumithrarachchi, C., Zhao, S., Minamisono, K., E-mail: minamiso@nscl.msu.edu, Barquest, B. R., Bollen, G., Hughes, M., Strum, R., Tarazona, D., Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, Cooper, K., Hammerton, K., Mantica, P. F., Morrissey, D. J., and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824. Mon . "A field programmable gate array-based time-resolved scaler for collinear laser spectroscopy with bunched radioactive potassium beams". United States. doi:10.1063/1.4895461.
@article{osti_22314449,
title = {A field programmable gate array-based time-resolved scaler for collinear laser spectroscopy with bunched radioactive potassium beams},
author = {Rossi, D. M., E-mail: rossi@nscl.msu.edu and Davis, M. and Ringle, R. and Rodriguez, J. A. and Ryder, C. A. and Schwarz, S. and Sumithrarachchi, C. and Zhao, S. and Minamisono, K., E-mail: minamiso@nscl.msu.edu and Barquest, B. R. and Bollen, G. and Hughes, M. and Strum, R. and Tarazona, D. and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824 and Cooper, K. and Hammerton, K. and Mantica, P. F. and Morrissey, D. J. and Department of Chemistry, Michigan State University, East Lansing, Michigan 48824},
abstractNote = {A new data acquisition system including a Field Programmable Gate Array (FPGA) based time-resolved scaler was developed for laser-induced fluorescence and beam bunch coincidence measurements. The FPGA scaler was tested in a collinear laser-spectroscopy experiment on radioactive {sup 37}K at the BEam COoler and LAser spectroscopy (BECOLA) facility at the National Superconducting Cyclotron Laboratory at Michigan State University. A 1.29 μs bunch width from the buncher and a bunch repetition rate of 2.5 Hz led to a background suppression factor of 3.1 × 10{sup 5} in resonant photon detection measurements. The hyperfine structure of {sup 37}K and its isotope shift relative to the stable {sup 39}K were determined using 5 × 10{sup 4} s{sup −1} {sup 37}K ions injected into the BECOLA beam line. The obtained hyperfine coupling constants A({sup 2}S{sub 1/2}) = 120.3(1.4) MHz, A({sup 2}P{sub 1/2}) = 15.2(1.1) MHz, and A({sup 2}P{sub 3/2}) = 1.4(8) MHz, and the isotope shift δν{sup 39,} {sup 37} = −264(3) MHz are consistent with the previously determined values, where available.},
doi = {10.1063/1.4895461},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 9,
volume = 85,
place = {United States},
year = {2014},
month = {9}
}