Contribution to a conference proceedings/Journal Article

PUBDB-2026-01159

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Percival soft X-ray CMOS Imager for Photon Science – Status and Prospects

Hajheidari, M. (Corresponding author)CFEL*Extern*DESY* ; Wunderer, C. B.CFEL*DESY* ; Correa, J.CFEL*XFEL.EU*DESY* ; Marras, A.CFEL*DESY* ; Lange, S. ; Dahlgruen, M. ; Gebert, J. ; Krivan, F. ; Shevyakov, I. ; Vardanyan, V. ; Wendt, T. ; Hoesch, M.DESY* ; Bagschik, K.DESY* ; Guerrini, N. ; Marsh, B. ; Sedgwick, I.CFEL*Extern* ; Nicholls, T. ; Cautero, G. ; Giuressi, D. ; Menk, R. H. ; Stebel, L.CFEL* ; Greer, A. ; Nichols, W. ; Nakhostin, M. ; Hyun, H. J. ; Kim, K. S. ; Kim, S. H. ; Park, S. Y. ; Rah, S. Y. ; Plönjes, E.DESY* ; Brenner, G.DESY* ; Kharitonov, K. ; Goutierrez, F. ; Hirono, T. ; Ruiz-Lopez, M. ; Pan, R.DESY* ; Gang, S.DESY* ; Keitel, B.DESY* ; Jelinek, S. ; Radloff, R. ; Graafsma, H.CFEL*XFEL.EU*DESY*

2025
IOP Publ. Bristol

This record in other databases:  

Please use a persistent id in citations: doi:10.1088/1742-6596/3010/1/012129  doi:10.3204/PUBDB-2026-01159

Abstract: Percival is a CMOS-based imager with 2 megapixels, also called P2M, designed for photon science experiments. The first generation of the P2M sensor showed some performance issues. Specifically, ADCs in full-speed operation mode are affected by crosstalk and show a non-linear and uncorrectable response. A firmware hack to the readout and data acquisition system has been introduced to partially overcome these effects, at the cost of limiting the frame rate to 83 Hz. Moreover, a non-uniform dark response of the sensor pixels is observed, explained by non-uniform bias currents across the chip: two opposite edges of the sensor cannot be digitized when applying biases that have the centre of the sensor operating normally. These issues are addressed in the re-submission of the chip. In this contribution, we present the current status of the detector and the first results from the re-designed sensor.

---

Contributing Institute(s):

1. FS-Detektor Systeme (FS-DS)
2. Beamline Optics Simulation (FS-PETRA-BO)
3. Experimentebetreuung PETRA III (FS-PET-S)
4. FLASH Photonen-Strahlführungen und Optiken (FS-FLASH-B)

Research Program(s):

1. 622 - Detector Technologies and Systems (POF4-622) (POF4-622)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

---

Database coverage:
; ; ; Nationallizenz

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Book/Proceedings Laasch, W. (Editor)DESY* ; Feidenhans'l, R. (Editor)XFEL.EU*
Synchrotron radiation instrumentation: proceedings, 15th international conference, SR>I 2024, Hamburg, Germany August 26-30, 2024
202515th International Conference on Synchrotron Radiation Instrumentation, SRI 2024, HamburgHamburg, Germany, 26 Aug 2024 - 30 Aug 20242024-08-262024-08-30 Bristol, UK : IOP Publishing Ltd, Journal of Physics: Conference Series 3010 (2025), nonconsec. pag. (2025)2025     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

---