Speaker
Prof.
Takaki Hatsui
(RIKEN, SPring-8 Center)
Description
The SPring-8 Angstrom Compact Free Electron Laser (SACLA) facility has
observed the X-ray lasing on June 7th, 2011. SACLA is the second laser
of its type in operation, following LCLS at the U.S. Department of
Energy's SLAC National Accelerator Laboratory. It has produced X-ray
laser with 0.08 nm wavelength, which is the world's shortest X-ray laser
light. SACLA offers scientists a new tool for studying and understanding
the arrangement of atoms moving extremely rapidly in various materials.
To meet various the scientific demands at SACLA, we have two X-ray 2D
detector projects, namely, multi-port CCD (MPCCD) detector, and multi-
via (MVIA) detector by using SOI sensor technology. The MPCCD sensor has
1024 x 512 pixels with 50 um square 2 phase pixels, and 8 output ports
at 5.3 MHz to enable 60 frames/sec readout. We have demonstrated the
performance of 4.5 Me- peak signal with < 300 e- noise, and over 30 Mrad
X-ray radiation hardness. 3 types of detector systems with 1, 2, and 8
sensor arrays have been developed. The latter MVIA detector has multi
charge collection nodes inside a pixel to transfer the signal charge
disproportionally to the dual gain amplifiers, which enables smaller
pixel with larger dynamic range. The goal of the MVIA sensor is to
improve the peak signal and noise performances to 7.5 Me- and 100 e-,
respectively, while shrinking the pixel size down to 30 um. A large area
sensor of this design has been submitted to produce 65.5 mm x 30.0 mm
sensor by a CMOS integrated circuit lithography stitching technique.
Author
Prof.
Takaki Hatsui
(RIKEN, SPring-8 Center)
