Piezo-modulated active grating for selecting X-ray pulses separated by one nanosecond.
Opt Express
; 29(22): 34962-34976, 2021 Oct 25.
Article
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| MEDLINE
| ID: mdl-34808943
ABSTRACT
We present a novel method of temporal modulation of X-ray radiation for time resolved experiments. To control the intensity of the X-ray beam, the Bragg reflection of a piezoelectric crystal is modified using comb-shaped electrodes deposited on the crystal surface. Voltage applied to the electrodes induces a periodic deformation of the crystal that acts as a diffraction grating, splitting the original Bragg reflection into several satellites. A pulse of X-rays can be created by rapidly switching the voltage on and off. In our prototype device the duty cycle was limited to â¼1 ns by the driving electronics. The prototype can be used to generate X-ray pulses from a continuous source. It can also be electrically correlated to a synchrotron light source and be activated to transmit only selected synchrotron pulses. Since the device operates in a non-resonant mode, different activation patterns and pulse durations can be achieved.
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MEDLINE
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En
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Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2021
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Article