公开(公告)号：US3566186A

公开(公告)日：1971-02-23

申请号：US3566186D

申请日：1968-09-10

Applicant: VARIAN ASSOCIATES

Inventor： WOOLSEY SAMUEL W

IPC: H05B41/04 ,  H05B37/00

CPC classification number: H05B41/042

Abstract: A circuit for starting a gas discharge lamp connected across a high voltage direct current source. The circuit comprises a saturable core transformer having primary windings connected in parallel with the lamp, and secondary windings connected in series therewith. A capacitor is connected in series with the primary winding. Switching means are provided for discharging the capacitor through the transformer to breakdown gas in the lamp. Another capacitor is connected across the serially connected secondary windings and lamp to provide a starting current through the lamp once it has become conductive. An operating circuit is also disclosed comprising a low voltage direct current source connected in parallel with the lamp across the high voltage source with like terminals of the two sources coupled together.

公开(公告)号：US3591830A

公开(公告)日：1971-07-06

申请号：US3591830D

申请日：1968-09-26

Applicant: VARIAN ASSOCIATES

Inventor： WOOLSEY SAMUEL W

IPC: H05B41/392 ,  H05B37/00 ,  H05B39/00 ,  H05B41/14

CPC classification number: H05B41/392

Abstract: A starting and operating circuit for a gas discharge lamp is disclosed as comprising a vacuum switch adapted to be connected across a gas discharge lamp, a unidirectional conductor adapted to be connected across a direct current source, and an inductor, the vacuum switch, unidirectional conductor and inductor being connected in series circuit.

公开(公告)号：US3585445A

公开(公告)日：1971-06-15

申请号：US3585445D

申请日：1969-03-03

Applicant: VARIAN ASSOCIATES

Inventor： MIRAM GEORGE V ,  WOOLSEY SAMUEL W

IPC: H01J3/02 ,  H01J9/00

CPC classification number: H01J3/02

Abstract: A method for preserving electron gun assemblies is disclosed. In the method, an electron gun assembly, including a thermionic cathode emitter, is assembled in a vacuum envelope structure. The envelope is evacuated, baked out, and the cathode processed in the conventional manner to activate the cathode. Beam voltages are applied to draw beam current from the gun to test proper operation thereof. These tests may include a test of beam diameter and permeance in the presence of a beam focusing magnetic or electric field. The processed and tested electron gun is then valved off from the rest of the envelope by means of a valve connected to the envelope portion including the electron gun. The valved-off gun is then detached from the vacuum envelope for preserving the electron gun in an operable condition for subsequent use in a second vacuum envelope structure.