ATTENZIONE!!! IL SISTEMA E' UTILIZZABILE ESCLUSIVAMENTE IN MODALITA' "CONSULTAZIONE". CAUSA PROBLEMI TECNICI, SI PREGA DI NON EFFETTUARE L'AUTENTICAZIONE, FINO A NUOVA COMUNICAZIONE. GRAZIE
 

Quantifying the Effect of Cosmic Ray Showers on the X-IFU Energy Resolution

Journal
Date Issued
2020
Author(s)
Peille, P.
•
den Hartog, R.
•
Miniussi, A.
•
Stever, S.
•
Bandler, S.
•
Kirsch, C.
•
Lorenz, M.
•
Dauser, T.
•
Wilms, J.
•
•
Gatti, F.
•
•
Jackson, B.
•
Pajot, F.
DOI
Abstract
The X-ray Integral Field Unit (X-IFU) will operate an array of more than 3000 Transition Edge Sensor pixels at 90 mK with an unprecedented energy resolution of 2.5 eV at 7 keV. In space, primary cosmic rays and secondary particles produced in the instrument structure will continuously deposit energy on the detector wafer and induce fluctuations on the pixels’ thermal bath. We have investigated through simulations of the X-IFU readout chain how these fluctuations eventually influence the energy measurement of X-ray photons. Realistic timelines of thermal bath fluctuations at different positions in the array are generated as a function of a thermal model and the expected distribution of the deposited energy of the charged particles. These are then used to model the TES response to these thermal perturbations and their influence on the onboard energy reconstruction process. Overall, we show that with adequate heatsinking, the main energy resolution degradation effect remains minimal and within the associated resolution allocation of 0.2 eV. We further study how a dedicated triggering algorithm could be put in place to flag the rarer large thermal events.
Volume
199
Issue
1-2
Start page
240
Uri
Url
Issn Identifier
0022-2291
Ads BibCode
2020JLTP..199..240P
Rights
open.access
File(s)
Loading...
Thumbnail Image
Name

LTD_Peille_EResCR_vrevision1.pdf

Description
postprint
Size

1009.52 KB

Format

Adobe PDF

Checksum (MD5)

44e61e4ed9d942fc6d0e66353d01555e

Loading...
Thumbnail Image
Name

s10909-019-02330-3.pdf

Description
[Administrators only]
Size

1.07 MB

Format

Adobe PDF

Checksum (MD5)

784d1e43f1d57d202bddc8a0c9604cef