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IRIS
The JEM-EUSO telescope will be, after calibration, a very accurate
instrument which yields the number of received photons from the number
of measured photo-electrons. The project is in phase A (demonstration of
the concept) including already operating prototype instruments, i.e.
many parts of the instrument have been constructed and tested.
Calibration is a crucial part of the instrument and its use. The focal
surface (FS) of the JEM-EUSO telescope will consist of about 5000
photo-multiplier tubes (PMTs), which have to be well calibrated to reach
the required accuracy in reconstructing the air-shower parameters. The
optics system consists of 3 plastic Fresnel (double-sided) lenses of 2.5
m diameter. The aim of the calibration system is to measure the
efficiencies (transmittances) of the optics and absolute efficiencies of
the entire focal surface detector. The system consists of 3 main
components: (i) Pre-flight calibration devices on ground, where the
efficiency and gain of the PMTs will be measured absolutely and also the
transmittance of the optics will be. (ii) On-board relative calibration
system applying two methods: a) operating during the day when the
JEM-EUSO lid will be closed with small light sources on board. b)
operating during the night, together with data taking: the monitoring of
the background rate over identical sites. (iii) Absolute in-flight
calibration, again, applying two methods: a) measurement of the moon
light, reflected on high altitude, high albedo clouds. b) measurements
of calibrated flashes and tracks produced by the Global Light System
(GLS). Some details of each calibration method will be described in this
paper.
The JEM-EUSO telescope will be, after calibration, a very accurate
instrument which yields the number of received photons from the number
of measured photo-electrons. The project is in phase A (demonstration of
the concept) including already operating prototype instruments, i.e.
many parts of the instrument have been constructed and tested.
Calibration is a crucial part of the instrument and its use. The focal
surface (FS) of the JEM-EUSO telescope will consist of about 5000
photo-multiplier tubes (PMTs), which have to be well calibrated to reach
the required accuracy in reconstructing the air-shower parameters. The
optics system consists of 3 plastic Fresnel (double-sided) lenses of 2.5
m diameter. The aim of the calibration system is to measure the
efficiencies (transmittances) of the optics and absolute efficiencies of
the entire focal surface detector. The system consists of 3 main
components: (i) Pre-flight calibration devices on ground, where the
efficiency and gain of the PMTs will be measured absolutely and also the
transmittance of the optics will be. (ii) On-board relative calibration
system applying two methods: a) operating during the day when the
JEM-EUSO lid will be closed with small light sources on board. b)
operating during the night, together with data taking: the monitoring of
the background rate over identical sites. (iii) Absolute in-flight
calibration, again, applying two methods: a) measurement of the moon
light, reflected on high altitude, high albedo clouds. b) measurements
of calibrated flashes and tracks produced by the Global Light System
(GLS). Some details of each calibration method will be described in this
paper.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/656188
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
La presente simulazione è stata realizzata sulla base delle specifiche raccolte sul tavolo ER del Focus Group IRIS coordinato dall’Università di Modena e Reggio Emilia e delle regole riportate nel DM 589/2018 e allegata Tabella A. Cineca, l’Università di Modena e Reggio Emilia e il Focus Group IRIS non si assumono alcuna responsabilità in merito all’uso che il diretto interessato o terzi faranno della simulazione. Si specifica inoltre che la simulazione contiene calcoli effettuati con dati e algoritmi di pubblico dominio e deve quindi essere considerata come un mero ausilio al calcolo svolgibile manualmente o con strumenti equivalenti.