Accession Number : AD0687672

Title :   DRUCKMESSUNG BEI STREUVERSUCHEN (Pressure Measurements in Scattering Experiments),

Corporate Author : STICHTING VOOR FUNDAMENTEEL ONDERZOEK DER MATERIE AMSTERDAM (NETHERLANDS) INSTITUUT VOOR ATOOM EN MOLECUULFYSICA

Personal Author(s) : Politick,Von J. ; Los,J. ; Ikelaar,P. G.

Report Date : 27 DEC 1967

Pagination or Media Count : 3

Abstract : In order to avoid thermal transpiration effects for which corrections are rather difficult to introduce, an ionization gauge of very small dimensions and of very low heat input (1 watt) has been fitted to the scattering chamber. This gauge was calibrated in the pressure range of .0001 to .00001 Torr by means of a McLeod gauge/ the capillaries of this gauge had an internal diameter of 4 mm. The accuracy of the absolute pressure measurement was within plus or minus 1%. By lowering the temperature of the scattering chamber to the temperature of liquid nitrogen the sensitivity of the ionization gauge dropped by about 8%. (Author)

Descriptors :   (*NUCLEAR SCATTERING, THERMAL DIFFUSION), IONIZATION GAGES, CALIBRATION, PRESSURE, MEASUREMENT, SENSITIVITY, NETHERLANDS

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE