Accession Number : AD0015433


Title :   MILLIMICROSECOND PULSE STUDIES. PART 1. IONIZATION PROCESSES IN HIGH-SPEED THYRATRONS


Corporate Author : CARNEGIE INST OF TECH PITTSBURGH PA


Personal Author(s) : Dean, William C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/015433.pdf


Report Date : 30 Sep 1952


Pagination or Media Count : 40


Abstract : Investigations were made of the basic differences in ionization phenomena between H and Hg thyratrons. A study was undertaken of the dependence of commutation time (the interval between the plate-voltage drop and the steady-state full-conduction condition) on tube geometry and gas pressure. Short commutation time was shown to result from the special shielded construction of the H thyratron. Higher gas pressure increased the number of molecules to be ionized, but decreased the collision energy of electrons by reducing their free paths. These opposing effects result in a maximum ionization rate between the low and high pressure extremes. Gas pressure and electrode separation were considered dependent variables; changes in gas pressure had the same effects toward minimizing commutation time as changes in electrode separation for a given anode voltage. At 1750 v and 700-micro pressure, a minimum commutation time and a maximum ionization rate were observed for a 5C22 thyratron.


Descriptors :   *THYRATRONS , RATES , THESES , VOLTAGE , LOW PRESSURE , HIGH PRESSURE , GASES , SHORT RANGE(TIME) , ELECTRONS , CONSTRUCTION , ELECTRODES , PRESSURE , GEOMETRY , IONIZATION , SHIELDING , SEPARATION , COLLISIONS , ANODES , ELECTRONIC COMMUTATORS , ENERGY , PATHS


Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE