Local space charge effect in conventional avalanche counters at moderate specific ionization

• Autorzy: Sernicki J.
• Języki publikacji: EN

Abstrakty

EN

The purpose of this investigation is the determination of a simple criterion of local space charge effect in conventional avalanche counters at moderate specific ionization. Parallel-plate avalanche counters (PPAC) with an electrode spacing d from 0.1 to 0.4 cm have been used to register low-energy alpha particles at n-heptane vapour pressures of p ? 5 Torr. The criterion determined is a simple h/pm function describing the variability of the product of effective gas amplification and actual particle energy loss, where both the numerical h coefficient and the exponent m assume different values for the various values of d. The product variability at higher gas pressures in PPAC detector – having regard to practical side of criterion determined – can be relatively well described by a single linear function. The results obtained are discussed from their veracity point of view.

Słowa kluczowe

EN

avalanche counter; gas amplification; n-heptane vapour; pulse amplitude characteristic; space charge

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2000
• Tom: Vol. 45, nr 2
• Strony: 125--131
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Sernicki J.

• Department of Nuclear Spectroscopy and Technique, The Andrzej Sołtan Institute for Nuclear Studies, 05-400 Otwock/Świerk, Poland Tel.: [phone], Fax: [phone],