VELA: a fast DEPFET readout circuit for the NHXM Mission

L. Bombelli; C. Fiorini; A. Marone; M. Uslenghi; M. Fiorini; G. E. Villa; M. Porro; J. Treis; S. Herrmann; A. Wassatsch

doi:10.1117/12.856398

29 July 2010 VELA: a fast DEPFET readout circuit for the NHXM Mission

L. Bombelli, C. Fiorini, A. Marone, M. Uslenghi, M. Fiorini, G. E. Villa, M. Porro, J. Treis, S. Herrmann, A. Wassatsch

Proceedings Volume 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray; 77323N (2010) https://doi.org/10.1117/12.856398
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

NHXM, under study by ASI (Agenzia Spaziale Italiana), is an X-ray observatory in the energy band between 0.5 and 80 keV and will have 3 telescopes dedicated to X-ray imaging with a field of view diameter of 12 arcmin and a focal length of 10 m. We report on the development of high-speed and low-noise readout of a monolithic array of DEPFET detector. The DEPFET based detectors, thanks to an intrinsic low anode capacitance, are suitable as low-energy detectors (from 0.5 to 10 keV) of the new NHXM telescope. The challenging requirements of the NHXM cameras regard the necessity to obtain images and spectra with nearly Fano-limited energy resolution with an absolute time resolution of about 100 μs. In order to exploit the speed capability of the DEPFET array, it has been developed a readout architecture based on the VELA circuit: a drain current readout configuration to implement an extremely fast readout (2 μs/row) and preserve the excellent noise performance of the detector. In the paper the foreseen maximum achievable frame-rate and the best energy resolution will be presented in order to assert the VELA suitability for X-ray imaging and spectroscopy.

Citation Download Citation

L. Bombelli, C. Fiorini, A. Marone, M. Uslenghi, M. Fiorini, G. E. Villa, M. Porro, J. Treis, S. Herrmann, and A. Wassatsch "VELA: a fast DEPFET readout circuit for the NHXM Mission", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77323N (29 July 2010); https://doi.org/10.1117/12.856398

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available