The CSPAD megapixel x-ray camera at LCLS

Hart, Philip; Boutet, Sébastien; Carini, G.; Dubrovin, M. M.; Duda, B. J.; Fritz, David; Haller, G.; Herbst, R.; Herrmann, Sven; Kenney, C. J.; Kurita, N.; Lemke, Henrik T.; Messerschmidt, Marc; Nordby, M.; Pines, J.; Schafer, Don; Swift, M.; Weaver, M.; Williams, Garth J.; Zhu, Diling; Bakel, N. van; Morse, J.

doi:10.1117/12.930924

Cited by 111 publications

(62 citation statements)

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“…Consider the CSPAD detector used at LCLS [4] as an example of a tiled detector system. The 2.2 megapixel version of the CSPAD detector is composed of 32 separate detector modules tiled together, with 8 modules mounted on each of four moveable quadrants so that the central hole can be optimized for each experiment as illustrated in Fig.…”

Section: Defining Sensor Module Positionsmentioning

confidence: 99%

“…Moreover large-area fast hybrid detectors are currently made from tiles due to the limited size of readout electronics [9]. Individual modules can be arranged in an offset manner surrounding a central hole through which the direct beam can pass [4,5,7], obviating the need for a beamstop, and may be movable so that the overall detector layout can be optimized for each experiment. However, movable modules introduce the necessity of determining the relative locations of each module with respect to the beam-sample interaction point each time the detector configuration is changed.…”

Section: Introductionmentioning

confidence: 99%

“…Each pulse can measure a different crystal, and diffraction patterns can be measured at the pulse repetition rate, which so far has been up to 120 Hz. Detectors developed for such applications typically consist of several small detector modules tiled together to cover a larger area, for example the CSPAD detector [3,4], pnCCD [5], MPCCD [6], AGIPD [7] and Percival [8] detectors. Other segmented X-ray detector systems are either planned or under development, including detectors for synchrotron applications.…”

Section: Introductionmentioning

confidence: 99%

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Accurate determination of segmented X-ray detector geometry

Yefanov¹,

Mariani²,

Gati³

et al. 2015

Opt. Express

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Recent advances in X-ray detector technology have resulted in the introduction of segmented detectors composed of many small detector modules tiled together to cover a large detection area. Due to mechanical tolerances and the desire to be able to change the module layout to suit the needs of different experiments, the pixels on each module might not align perfectly on a regular grid. Several detectors are designed to permit detector sub-regions (or modules) to be moved relative to each other for different experiments. Accurate determination of the location of detector elements relative to the beam-sample interaction point is critical for many types of experiment, including X-ray crystallography, coherent diffractive imaging (CDI), small angle X-ray scattering (SAXS) and spectroscopy. For detectors with moveable modules, the relative positions of pixels are no longer fixed, necessitating the development of a simple procedure to calibrate detector geometry after reconfiguration. We describe a simple and robust method for determining the geometry of segmented X-ray detectors using measurements obtained by serial crystallography. By comparing the location of observed Bragg peaks to the spot locations predicted from the crystal indexing procedure, the position, rotation and distance of each module relative to the interaction region can be refined. We show that the refined detector geometry greatly improves the results of experiments. #245734Received 17 Boutet, M. Messerschmidt, and I. Schlichting, "De novo protein crystal structure determination from X-ray freeelectron laser data," Nature 505(7482), 244-247 (2013). 23. M. Schmidt, K. Pande, S. Basu, and J. Tenboer, "Room temperature structures beyond 1.5 Å by serial femtosecond crystallography," Struct. Dyn. 2(4), 041708 (2015).

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Section: Defining Sensor Module Positionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Accurate determination of segmented X-ray detector geometry

Yefanov¹,

Mariani²,

Gati³

et al. 2015

Opt. Express

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“…2D diffraction images, as illustrated in Figure 1, were recorded on multiple CSPAD detectors [17] placed in a transmission Debye-Scherrer geometry [19], which were then integrated azimuthally to produce 1D diffraction profiles. A VISAR (Velocity Interferometer System for Any Reflector) was used to both record the velocity-time histories of the rear free surface of the samples, thereby allowing the sample pressure to be determined, and to investigate any nonplanarity of the laser drive across the x-rayed region of the target.…”

mentioning

confidence: 99%

Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa

et al. 2017

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“…The detector is made of 32 silicon sensors 500µm thick bumpManuscript received November 16, 2012. SLAC- PUB-15277bonded to 64 185x194-pixel ASICs tiled to cover a square approximately 17 cm by 17 cm [1], [2], [3], [4]. The CSPAD camera has experienced radiation damage whose symptoms fall into several categories.…”

Section: Introductionmentioning

confidence: 99%

High-Z radiation shields for x-ray free electron laser detectors

Tomada

Boutet

Duda

et al. 2012

2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record (NSS/MIC)

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The Linac Coherent Light Source (LCLS) produces brilliant x-ray in femtosecond pulses of high intensity. Many of the experiments performed at the LCLS use expensive pixel area detectors -the majority of which incorporate custom integrated circuit chips (ASIC). Such circuit chips are susceptible to radiation damage. To protect against this, micro-patterned tungsten foils were designed to cover the section of the circuit chip that extends beyond the sensor near the wire-bond pads. A description of the problem along with the details of how the tungsten foils were fabricated and installed will be given.

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The CSPAD megapixel x-ray camera at LCLS

Cited by 111 publications

References 0 publications

Accurate determination of segmented X-ray detector geometry

Accurate determination of segmented X-ray detector geometry

Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa

High-Z radiation shields for x-ray free electron laser detectors

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