A large area time-of-flight system with a resolution of 0.5 ns fwhm

doi:10.1016/0029-554X(76)90280-9

Nuclear Instruments and Methods

Volume 134, Issue 2, 15 April 1976, Pages 261-266

https://doi.org/10.1016/0029-554X(76)90280-9 Get rights and content

Abstract

We have built a time-of-flight counter hodoscope consisting of 62 scintillation counters with dimension 172×20×2 cm³ each. The counters were tested using electrons from an external beam at the DESY synchrotron in Hamburg. The time of flight was measured between a small scintillation counter and the hodoscope counters. We obtained a resolution of 0.5 ns fwhm, summed over all 62 counters. At present the system is in operation at the Double Arm Spectrometer DASP at the storage ring DORIS. By using data on the reactionse ⁺esu−→e⁺e⁻, μ⁺μ⁻ we have obtained a resolution of 0.6 ns fwhm, which will be improved in the near future.

References (4)

BraunschweigW. et al.
Phys. Lett.
(1974)
BraunchsweigW. et al.
Phys. Lett.
(1974)
BraunschweigW. et al.
Phys. Lett.
(1975)
GattiE. et al.
Nucl. Instr.
(1959)

There are more references available in the full text version of this article.

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^*: Now at III. Physikalisches Institut der RWTH, Aachen, Germany.

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A large area time-of-flight system with a resolution of 0.5 ns fwhm

Abstract

Phys. Lett.

Phys. Lett.

Phys. Lett.

Nucl. Instr.