Rev. Phys. Appl. (Paris) 12, 1521-1524 (1977)
DOI: 10.1051/rphysap:0197700120100152100

A review of some suppressed accelerator tube installations

D.M. Shepherd

Megavolt Ltd., Cornhill, Ilminster, Somerset, TA 19, OAH, Great Britain

Abstract
Since its formation in 1965 the company, (under licence from the United Kingdom Atomic Energy Authority and the Science Research Council of Great Britain), has designed, manufactured, and supplied a considerable number of suppressed accelerator tubes for various makes and types of Single Ended and Tandem Van de Graaff accelerators and High Voltage sets in the United Kingdom and overseas. The theory and principles of electrostatic and magnetic types of suppression for accelerator tubes are well reported elsewhere [1,2] but this report summarizes the performances of typical accelerator installations with which we have been involved and where a suppressed tube is now installed. As and where appropriate we comment on 1) The reasons for having a suppressed tube. 2) The design parameters - choice of magnetic or electrostatic suppression. 3) The accelerator's performance before and after the suppressed tube installation. 4) Other benefits from the use of a suppressed tube. The review is compiled from company records and user reports.

Résumé
Ce rapport est un résumé des performances d'installation d'accélérateur typique, avec lesquelles nous avons été concernés et où un tube à suppression d'électrons est maintenant installé. Notre commentaire portera sur les points suivants : les raisons pour disposer d'un tube à suppression d'électrons, les paramètres de la réalisation, choix d'une suppression magnétique en électrostatique, les performances des accélérateurs avant et après l'installation du tube à suppression et les autres avantages dûs à l'utilisation d'un tube à suppression.

PACS
2915B - Electrostatic accelerators.
7410 - Particle accelerators.

Key words
electrostatic accelerators -- van de Graaff accelerators -- review -- suppressed accelerator tube installations -- Van de Graaff accelerators -- High Voltage sets -- design parameters -- electrostatic suppression -- accelerator's performance -- magnetic suppression -- X ray loading -- electron stream suppression