High repetition frequency flashlamp for long Nd:YAG or Er:YAG laser rods, new

Description

Classical (years 80'), relatively high repetition frequency, pulsed xenon flashlamp to pump 4 mm - 7 mm dia. relatively long Nd:YAG or Er:YAG laser rods, or even Nd: glass or ruby laser rods, type INP-5/90A-1 from Russian Federation. New, never used, label from the original package attached (last picture). Plasma discharge size: 5 mm dia. x 90 mm length, ideally should match the laser rod size. Appropriate for rods with 80 mm - 100 mm in length. Outer diameter of lamp 6.7 mm. Total lamp length (with electrodes) 210 mm. Though the electrodes look similar, they are polarized, and the anode is marked with the (+) sign and the Russian letters indicating the lamp type. The cathode side has the marking letters OTK, meaning "quality control" in Russian. The following nominal parameters are from the original data sheet of the lamp. For low repetition frequency regime, i.e., below 1 Hz, discharge energy 12 J - 110 J, no liquid cooling necessary, estimated lifetime 4 x 10
5
pulses, no simmer mode necessary. For high repetition frequency regime, i.e., for repetition frequency of 20 Hz - 100 Hz, discharge energy 12 J - 36 J, liquid (distilled water) cooling necessary, estimated lifetime (2.5 - 10) x 10
5
, simmer mode necessary. Data about the main RLC discharge circuit, the simmer mode power supply, and the trigger circuit: pulse duration T (at 0.35 of peak current) 80us - 150 us (us = microsecond); energy storage capacitor voltage 650 V - 1500 V; simmer current (1 - 2) A; min. voltage (infinite load) to start the simmer mode 1000 V; series trigger scheme; trigger voltage (in 100 kiloohm load) 16 kV- 24 kV; min. trigger voltage (in 20 kiloohm load) 8 kV; trigger pulse duration 1 us - 5 us; series coil inductance to have an almost damped RLC circuit (L = T
2
/(9C), where L = coil inductance, C = energy storage capacitor capacitance).
For other details of the discharge circuit design, please inspire yourself from the Catalogue Verre et Quartz, at: flashlamps-vq.com/CatalogueVQF.pdf, and from the course "Flashlamps power supplies and triggering" at http://pe2bz.philpem.me.uk/Lights/-%20Laser/Info-902-LaserCourse/c04-04/mod04_04.htm. Flashlamp intended for laser professionals or for laser hobbyists. Also as laser history collectible item.