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First experimental feasibility study of VIPIC: a custom-made detector for X-ray speckle measurements

Journal Article · · Journal of Synchrotron Radiation (Online)
 [1];  [1];  [2];  [3];  [1];  [4];  [5];  [5];  [5];  [5];  [1];  [6]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. AGH Univ. of Science and Technology, Krakow (Poland). Dept. of Metrology and Electronics
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS), X-ray Science Division
  6. McGill Univ., Montreal, QC (Canada). Dept of Physics
+ Show Author Affiliations

The Vertically Integrated Photon Imaging Chip (VIPIC) was custom-designed for X-ray photon correlation spectroscopy, an application in which occupancy per pixel is low but high time resolution is needed. VIPIC operates in a sparsified streaming mode in which each detected photon is immediately read out as a time- and position-stamped event. This event stream can be fed directly to an autocorrelation engine or accumulated to form a conventional image. The detector only delivers non-zero data (sparsified readout), greatly reducing the communications overhead typical of conventional frame-oriented detectors such as charge-coupled devices or conventional hybrid pixel detectors. This feature allowscontinuousacquisition of data with timescales from microseconds to hours. In this work VIPIC has been used to measure X-ray photon correlation spectroscopy data on polystyrene latex nano-colliodal suspensions in glycerol and on colloidal suspensions of silica spheres in water. Relaxation times of the nano-colloids have been measured for different temperatures. These results demonstrate that VIPIC can operatecontinuouslyin the microsecond time frame, while at the same time probing longer timescales.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515; AC02-06CH11357; SC0012704
OSTI ID:
1256705
Alternate ID(s):
OSTI ID: 1331594
OSTI ID: 1354368
OSTI ID: 22735839
Journal Information:
Journal of Synchrotron Radiation (Online), Journal Name: Journal of Synchrotron Radiation (Online) Journal Issue: 2 Vol. 23; ISSN 1600-5775; ISSN JSYRES
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English

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