IEC 61788-22-3:2022

IEC 61788-22-3 ®
Edition 1.0 2022-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Superconductivity –
Part 22-3: Superconducting strip photon detector – Dark count rate

Supraconductivité –
Partie 22-3: Détecteur de photons à bande supraconductrice – Taux de
comptage en obscurité
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IEC 61788-22-3 ®
Edition 1.0 2022-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Superconductivity –
Part 22-3: Superconducting strip photon detector – Dark count rate

Supraconductivité –
Partie 22-3: Détecteur de photons à bande supraconductrice – Taux de

comptage en obscurité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.050 ISBN 978-2-8322-4070-0

– 2 – IEC 61788-22-3:2022 © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 10
4 Principle of the measurement method . 10
5 Apparatus . 11
5.1 Detector packaging . 11
5.2 Cryogenic system . 11
5.3 Measurement system . 13
6 Measurement procedure . 14
6.1 Measurement of temperature . 14
6.2 Measurement of switching current . 14
6.3 Measurement of R . 15
D
7 Standard uncertainty . 16
7.1 Type A uncertainty . 16
7.2 Type B uncertainty . 16
7.3 Uncertainty budget table . 17
7.4 Uncertainty requirement . 18
8 Test report . 18
8.1 Identification of device under test (DUT) . 18
8.2 Measurement conditions and results . 18
8.3 Miscellaneous optional report . 19
Annex A (informative) Results of the round robin test. 20
A.1 DUT packages . 20
A.2 Measurement conditions . 20
A.3 Measurement results . 21
Bibliography . 25

Figure 1 – Example of one dark count pulse in the pulse train in inset . 9
Figure 2 – Schematic curve of R as a function of normalized bias current . 11
D
Figure 3 – Schematic diagram of a typical DCR measurement system . 12
Figure 4 – Equivalent circuit of the DCR measurement . 13
Figure 5 – Typical current-voltage (I-U) curve of an SSPD . 15
Figure A.1 – Photograph of the DUT with an SSPD and a temperature sensor . 20
Figure A.2 – I-U curve and R curves . 22
D
Table 1 – Uncertainty budget table for R . 18
D
Table A.1 – Test data of DUT . 22
Table A.2 – Temperature sensitivity and bias current sensitivity above a normalized
bias current of 0,9 . 23

Table A.3 – u and u above a normalized bias current of 0,9 . 23
A B
Table A.4 – Budget table for R at a bias point of 5,25 µA (I /I = 0,955) . 23
D b sw
Table A.5 – DCR values measured at a bias point of 5,25 µA (I /I = 0,955) . 24
b sw
Table A.6 – Temperature measurement . 24

– 4 – IEC 61788-22-3:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SUPERCONDUCTIVITY –
Part 22-3: Superconducting strip photon detector – Dark count rate

FOREWORD
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