MEDSI2018 - List of Keywords (timing)

Paper	Title	Other Keywords	Page
THPH02	LCLS Pulse Selector, A Multifunction Shutter for the LCLS-I 120 Hz FEL	controls, operation, FEL, MMI	336
	R. Armenta, E.A. Paiser SLAC, Menlo Park, California, USA
	The LCLS Pulse Selector was designed to pick specific pulses and reduce the repetition rate of the 120Hz LCLS pulse train in support of widely diverse, user defined experiments. It utilizes two rotating parallel plates to alternately transmit and block pulses in a single sweeping motion. A conventional stepper motor connected to the plates provides the rotation. The key to the system is its sophisticated timing scheme. Each sweep of the shutter is synchronized (with a precise delay) with the event codes normally generated with each pulse for data acquisition use. This shutter system has the capability of reducing the repetition rate of the LCLS x-ray to any frequency less than or equal to 60Hz in order to select a single pulse of LCLS x-ray beam at 120Hz. Since its installation, the pulse selector has been used in multiple experiments with great success providing independent pulse selection to individual beamlines at the same time.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH02
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Paper

Title

Other Keywords

Page

THPH02

LCLS Pulse Selector, A Multifunction Shutter for the LCLS-I 120 Hz FEL

controls, operation, FEL, MMI

336

R. Armenta, E.A. Paiser
SLAC, Menlo Park, California, USA

The LCLS Pulse Selector was designed to pick specific pulses and reduce the repetition rate of the 120Hz LCLS pulse train in support of widely diverse, user defined experiments. It utilizes two rotating parallel plates to alternately transmit and block pulses in a single sweeping motion. A conventional stepper motor connected to the plates provides the rotation. The key to the system is its sophisticated timing scheme. Each sweep of the shutter is synchronized (with a precise delay) with the event codes normally generated with each pulse for data acquisition use. This shutter system has the capability of reducing the repetition rate of the LCLS x-ray to any frequency less than or equal to 60Hz in order to select a single pulse of LCLS x-ray beam at 120Hz. Since its installation, the pulse selector has been used in multiple experiments with great success providing independent pulse selection to individual beamlines at the same time.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH02

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)