A transient digitiser for fast air shower events

Wild, N. R.; Clay, R. W.

Air shower structure are often measured on time scales of a few nanoseconds. Longitudinal disk structure near the core is of the order of meters in dimension, air Cerenkov pulses have full widths at half maximum of the order of tens of nanoseconds, and fast timing over typical arrays is usually measured to nanosecond accuracy. oscilloscopes can be used but have very limited dynamic range and are expensive if measurements down to a few nanoseconds are to be made. For the fast Cerenkov work, an instrument with better dynamic range than an oscilloscope and with a time resolution sufficient to allow measurements limited only by system risetime of a few nanoseconds is needed. A 16/32 channel, 8 bit, fast transient digitizer was designed and built which runs at sample intervals down to approx. 1 nanosecond per channel.

Document ID

19850027784

Acquisition Source

Legacy CDMS

Document Type

Conference Paper

Authors

Date Acquired

August 12, 2013

Publication Date

August 1, 1985

Publication Information

Publication: 19th Intern. Cosmic Ray Conf - Vol. 8

Subject Category

Report/Patent Number

Accession Number

85N36097

Distribution Limits

Public

Work of the US Gov. Public Use Permitted.

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