Measurement of charge state distributions using a scintillation screen

C. Marshall; Z. Meisel; F. Montes; L. Wagner; K. Hermansen; R. Garg; K. A. Chipps; P. Tsintari; N. Dimitrakopoulos; G. P.A. Berg; C. Brune; M. Couder; U. Greife; H. Schatz; M. S. Smith

doi:10.1016/j.nima.2023.168661

Measurement of charge state distributions using a scintillation screen

C. Marshall, Z. Meisel, F. Montes, L. Wagner, K. Hermansen, R. Garg, K. A. Chipps, P. Tsintari, N. Dimitrakopoulos, G. P.A. Berg, C. Brune, M. Couder, U. Greife, H. Schatz, M. S. Smith

Nuclear Structure and Nuclear Astrophysi

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4 Scopus citations

Abstract

Absolute cross sections measured using electromagnetic devices to separate and detect heavy recoiling ions need to be corrected for charge state fractions. Accurate prediction of charge state distributions using theoretical models is not always a possibility, especially in energy and mass regions where data is sparse. As such, it is often necessary to measure charge state fractions directly. In this paper we present a novel method of using a scintillation screen along with a CMOS camera to image the charge dispersed beam after a set of magnetic dipoles. A measurement of the charge state distribution for ⁸⁸Sr passing through a natural carbon foil is performed. Using a Bayesian model to extract statistically meaningful uncertainties from these images, we find agreement between the new method and a more traditional method using Faraday cups. Future work is need to better understand systematic uncertainties. Our technique offers a viable method to measure charge state distributions.

Original language	English
Article number	168661
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1056
DOIs	https://doi.org/10.1016/j.nima.2023.168661
State	Published - Nov 2023

Funding

The authors would like to thank Sam Nash and Ana Henriques for their critical support during the experiment, and to the rest of the ReA3 staff. Additional thanks to Kiana Setoodehnia for her helpful comments on the manuscript. This material is based upon work supported by the U.S. DOE, Office of Science, Office of Nuclear Physics under contract DE-AC05-00OR22725 (ORNL) and Science grants: DE-FG02-88ER40387 (OU) and DE-FG02-93ER40789 (CSM). Support was also provided from the National Science Foundation, United States through Grants No. PHY-2011890 (UND) and PHY-1913554 , PHY-2209429 (MSU). SECAR is supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics , under Award Number DE-SC0014384 and by the National Science Foundation, United States under grant No. PHY-1624942 with additional support from PHY 08-22648 (Joint Institute for Nuclear Astrophysics) and PHY-1430152 (JINA-CEE).

Keywords

Bayesian analysis
Charge state distribution
Recoil separators
Scintillation screen

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10.1016/j.nima.2023.168661

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Marshall, C., Meisel, Z., Montes, F., Wagner, L., Hermansen, K., Garg, R., Chipps, K. A., Tsintari, P., Dimitrakopoulos, N., Berg, G. P. A., Brune, C., Couder, M., Greife, U., Schatz, H., & Smith, M. S. (2023). Measurement of charge state distributions using a scintillation screen. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1056, Article 168661. https://doi.org/10.1016/j.nima.2023.168661

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title = "Measurement of charge state distributions using a scintillation screen",

abstract = "Absolute cross sections measured using electromagnetic devices to separate and detect heavy recoiling ions need to be corrected for charge state fractions. Accurate prediction of charge state distributions using theoretical models is not always a possibility, especially in energy and mass regions where data is sparse. As such, it is often necessary to measure charge state fractions directly. In this paper we present a novel method of using a scintillation screen along with a CMOS camera to image the charge dispersed beam after a set of magnetic dipoles. A measurement of the charge state distribution for 88Sr passing through a natural carbon foil is performed. Using a Bayesian model to extract statistically meaningful uncertainties from these images, we find agreement between the new method and a more traditional method using Faraday cups. Future work is need to better understand systematic uncertainties. Our technique offers a viable method to measure charge state distributions.",

keywords = "Bayesian analysis, Charge state distribution, Recoil separators, Scintillation screen",

author = "C. Marshall and Z. Meisel and F. Montes and L. Wagner and K. Hermansen and R. Garg and Chipps, \{K. A.\} and P. Tsintari and N. Dimitrakopoulos and Berg, \{G. P.A.\} and C. Brune and M. Couder and U. Greife and H. Schatz and Smith, \{M. S.\}",

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doi = "10.1016/j.nima.2023.168661",

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Marshall, C, Meisel, Z, Montes, F, Wagner, L, Hermansen, K, Garg, R, Chipps, KA, Tsintari, P, Dimitrakopoulos, N, Berg, GPA, Brune, C, Couder, M, Greife, U, Schatz, H & Smith, MS 2023, 'Measurement of charge state distributions using a scintillation screen', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1056, 168661. https://doi.org/10.1016/j.nima.2023.168661

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T1 - Measurement of charge state distributions using a scintillation screen

AU - Marshall, C.

AU - Meisel, Z.

AU - Montes, F.

AU - Wagner, L.

AU - Hermansen, K.

AU - Garg, R.

AU - Chipps, K. A.

AU - Tsintari, P.

AU - Dimitrakopoulos, N.

AU - Berg, G. P.A.

AU - Brune, C.

AU - Couder, M.

AU - Greife, U.

AU - Schatz, H.

AU - Smith, M. S.

PY - 2023/11

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N2 - Absolute cross sections measured using electromagnetic devices to separate and detect heavy recoiling ions need to be corrected for charge state fractions. Accurate prediction of charge state distributions using theoretical models is not always a possibility, especially in energy and mass regions where data is sparse. As such, it is often necessary to measure charge state fractions directly. In this paper we present a novel method of using a scintillation screen along with a CMOS camera to image the charge dispersed beam after a set of magnetic dipoles. A measurement of the charge state distribution for 88Sr passing through a natural carbon foil is performed. Using a Bayesian model to extract statistically meaningful uncertainties from these images, we find agreement between the new method and a more traditional method using Faraday cups. Future work is need to better understand systematic uncertainties. Our technique offers a viable method to measure charge state distributions.

AB - Absolute cross sections measured using electromagnetic devices to separate and detect heavy recoiling ions need to be corrected for charge state fractions. Accurate prediction of charge state distributions using theoretical models is not always a possibility, especially in energy and mass regions where data is sparse. As such, it is often necessary to measure charge state fractions directly. In this paper we present a novel method of using a scintillation screen along with a CMOS camera to image the charge dispersed beam after a set of magnetic dipoles. A measurement of the charge state distribution for 88Sr passing through a natural carbon foil is performed. Using a Bayesian model to extract statistically meaningful uncertainties from these images, we find agreement between the new method and a more traditional method using Faraday cups. Future work is need to better understand systematic uncertainties. Our technique offers a viable method to measure charge state distributions.

KW - Bayesian analysis

KW - Charge state distribution

KW - Recoil separators

KW - Scintillation screen

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Measurement of charge state distributions using a scintillation screen

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