Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM

for the NectarCAM collaboration and the CTA consortium

doi:10.1117/12.2530996

Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM

for the NectarCAM collaboration and the CTA consortium

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The measurement of the photomultiplier gain is a crucial step for Imaging Atmospheric Cherenkov Telescopes in order to translate the measured charge to a number of photons. For that, one of the possibility is to perform measurements with a flashing light source at a low intensity level, in order to reconstruct the charge distribution of a single photon. In this contribution, we will present a method to reconstruct the single photo electron spectrum using low intensity charge distribution. We will show that the usually adopted Gaussian assumption does not reproduce well this data, and will present a new model which explains the data behavior. The impact of this measurement on the gain determination will be presented, and the associated uncertainty will be discussed.

Original language	English
Title of host publication	Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX
Editors	Stephen L. O'Dell, Giovanni Pareschi
Publisher	SPIE
ISBN (Electronic)	9781510629318
DOIs	https://doi.org/10.1117/12.2530996
Publication status	Published - 1 Jan 2019
Event	Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX 2019 - San Diego, United States Duration: 13 Aug 2019 → 15 Aug 2019

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11119
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX 2019
Country/Territory	United States
City	San Diego
Period	13/08/19 → 15/08/19

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10.1117/12.2530996

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for the NectarCAM collaboration and the CTA consortium (2019). Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM. In S. L. O'Dell, & G. Pareschi (Eds.), Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX Article 111191W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11119). SPIE. https://doi.org/10.1117/12.2530996

@inproceedings{2275f64d25874ce18a1efc513297f228,

title = "Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM",

abstract = "The measurement of the photomultiplier gain is a crucial step for Imaging Atmospheric Cherenkov Telescopes in order to translate the measured charge to a number of photons. For that, one of the possibility is to perform measurements with a flashing light source at a low intensity level, in order to reconstruct the charge distribution of a single photon. In this contribution, we will present a method to reconstruct the single photo electron spectrum using low intensity charge distribution. We will show that the usually adopted Gaussian assumption does not reproduce well this data, and will present a new model which explains the data behavior. The impact of this measurement on the gain determination will be presented, and the associated uncertainty will be discussed.",

author = "\{for the NectarCAM collaboration and the CTA consortium\} and Sami Caroff and Stephen Fegan and Pierre Jean and Olive, \{Jean Fran{\c c}ois\} and Adellain Tsiahina",

note = "Publisher Copyright: {\textcopyright} 2019 SPIE.; Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX 2019 ; Conference date: 13-08-2019 Through 15-08-2019",

year = "2019",

month = jan,

day = "1",

doi = "10.1117/12.2530996",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "O'Dell, \{Stephen L.\} and Giovanni Pareschi",

booktitle = "Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX",

}

for the NectarCAM collaboration and the CTA consortium 2019, Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM. in SL O'Dell & G Pareschi (eds), Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX., 111191W, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11119, SPIE, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX 2019, San Diego, United States, 13/08/19. https://doi.org/10.1117/12.2530996

Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM. / for the NectarCAM collaboration and the CTA consortium.
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX. ed. / Stephen L. O'Dell; Giovanni Pareschi. SPIE, 2019. 111191W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11119).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM

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AU - Caroff, Sami

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AU - Jean, Pierre

AU - Olive, Jean François

AU - Tsiahina, Adellain

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The measurement of the photomultiplier gain is a crucial step for Imaging Atmospheric Cherenkov Telescopes in order to translate the measured charge to a number of photons. For that, one of the possibility is to perform measurements with a flashing light source at a low intensity level, in order to reconstruct the charge distribution of a single photon. In this contribution, we will present a method to reconstruct the single photo electron spectrum using low intensity charge distribution. We will show that the usually adopted Gaussian assumption does not reproduce well this data, and will present a new model which explains the data behavior. The impact of this measurement on the gain determination will be presented, and the associated uncertainty will be discussed.

AB - The measurement of the photomultiplier gain is a crucial step for Imaging Atmospheric Cherenkov Telescopes in order to translate the measured charge to a number of photons. For that, one of the possibility is to perform measurements with a flashing light source at a low intensity level, in order to reconstruct the charge distribution of a single photon. In this contribution, we will present a method to reconstruct the single photo electron spectrum using low intensity charge distribution. We will show that the usually adopted Gaussian assumption does not reproduce well this data, and will present a new model which explains the data behavior. The impact of this measurement on the gain determination will be presented, and the associated uncertainty will be discussed.

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DO - 10.1117/12.2530996

M3 - Conference contribution

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BT - Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX

A2 - O'Dell, Stephen L.

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PB - SPIE

T2 - Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX 2019

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for the NectarCAM collaboration and the CTA consortium. Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM. In O'Dell SL, Pareschi G, editors, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX. SPIE. 2019. 111191W. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2530996

Determination of the single photo-electron spectrum and gain measurement for the Cherenkov Telescope Array camera NectarCAM

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