High-average power Xe flashlamp with cooling jacket assy. for YAG lasers, new

Description

Vintage (years 80'), pulsed xenon - filled, high average power, medium peak power, linear flashlamp to pump Nd:YAG or Er:YAG laser rods, type FX 195C-3, made by EG&G, now Perkin-Elmer, USA. The linear design assures the best pump efficiency in an elliptical pumping chamber, ideal for a laser rod oscillator or amplifier. Discharge dimensions: 4 mm dia. x 75 mm length, ideally should match the laser rod size. Good for rods of 3 mm - 6.4 mm dia. and 70 mm - 85 mm length. With cooling jacket and external trigger Ni wire (picture #1). The lamp dimensions are: outer dia. 6.2 mm, total length (with electrodes) 135 mm. The cooling jacket dimensions are: internal diameter 9.9 mm - 10.0 mm, outer diameter 12.2 mm, length 150 mm. Total length of the whole assembly (flashlamp, glass/quartz cooling jacket, external metallic contacts and water cooling accessories) 254 mm. The electrodes are polarized, the anode (the positive one) has a larger diameter at the tip and a red copper-color at its base - picture #3; cathode is in picture #2). New, never used, no original box. The following data are taken from the actual, new Perkin-Elmer flashlamp with the same discharge size, type QXF-series, 4 mm internal dia. x 75 mm length (see picture #4). Ideally, a critically damped K
0
LC circuit should be used (with K
0
the impedance parameter, i.e., an equivalent nonlinear resistor, variable during the discharge pulse). For this flashlamp K
0
= 24 ohm
*
A
1/2
. Operating DC voltage V
0
= 600 V - 2100 V. Min. trigger voltage: 16 kV. Max. ave. power with water cooling: 1800 W. For detailed characteristics, circuitry, and design, please see the actual Perkin-Elmer Optoelectronics Catalogue "High Performance Flash and Arc Lamps", at https://laser-caltech.web.cern.ch/laser-caltech/report/Flash%20lamp%20Eg&G.pdf. From that we can calculate the following performances for a critically damped K
0
LC circuit and assuming a 200 us (us = microsecond) pulse duration (defined at 1/3 of the discharge pulse amplitude). Typical explosion energy (for few pulses lifetime): E
X
= 574 J. Examples of two suggested operating regimes follows. Example 1: Discharge energy E
0
= 100 J; lifetime (total no.of pulses) N > 2 x 10
6
; energy storage capacitor C = 100 uF (uF =microfarad); nominal charging voltage V
0
= 1400 V; current limiting coil inductance L = 44 uH (uH = microhenry). Example 2: Discharge energy E
0
= 75 J; lifetime (total no. of pulses) N > 3.2 x 10
6
; energy storage capacitor C = 90 uF; nominal charging voltage V
0
= 1300 V; current limiting coil inductance L = 50 uH. This flashlamp is intended to be used both by laser professionals and by laser hobbyists.