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Topic: Sprytron

	[No title] (Site not responding. Last check: 2007-10-29)
		The Sprytron, otherwise known as the Vacuum Krytron, is a device of very similar performance to the Krytron.
		The sprytron is a hard vacuum 'filled' device unlike the krytron which, as noted above contains a low pressure gas.
		The Sprytron requires a more powerful trigger pulse than the Krytron, as the device works by forming an arc directly between the trigger and the cathode, which causes the tube to breakdown (go into conduction) by disrupting the field between the anode and cathode.
	www.tesla-coil.com /Sprytron.htm (0 words)

	SPRYTRON - GoGoSearch.com
		Sprytron and is designed for use in environments where high levels of ionizing radiation are present (because the...
		Sprytron, otherwise known as the Vacuum Krytron, is a device of very similar performance to the Krytron.
		sprytron is able to handle larger inline loads and is slightly faster...
	www.gogosearch.com /wiki/sprytron (76 words)

	Pulse Power Switching Devices
		Although it is usually stated that Krytrons were the devices sought in smuggling involving Israel, Iraq and Pakistan, it may well be that Sprytrons were involved with at least some of these cases, rather than the gas filled krytron, due to the very similar size and performance coupled with very high radiation resistance.
		It is interesting to note that in application circuits (references 1 and 4) the sprytron is always shown directly switching a load (an Exploding bridge Wire.) and a Krytron is always shown triggering a secondary device such as a triggered spark gap.
		This may just be coincidence, but as there is no apparent reason why a sprytron couldn't be used in either role, it also occurs to me that possibly such a design might be significant in the design of nuclear warheads, certainly this would appear to be a useful combination (see section 4).
	nuclearweaponarchive.org /Library/Pasley1.html (0 words)

	U.S. Patent: 5206455 - Laser initiated ordnance systems - April 27, 1993
		In an exemplary baseline embodiment to be described later, a known "Sprytron" vacuum arc switch is used.
		When the pulse amplitude across the secondary of the trigger transformer rises to the self-breakdown voltage of a small gas gap switch 236, a fast-risetime trigger pulse is applied to the "Sprytron" trigger input, causing the "Sprytron" main gap to conduct.
		The low side of the "Sprytron" is connected to three flashlamps 222 via a network of series injection transformer networks 226 (one network per flashlamp) and an air-core choke 227.
	www.everypatent.com /comp/pat5206455.html (19625 words)

	Spark gap Information - spark gap
		Special purpose, high-energy triggerable spark gaps are also used to rapidly switch champion aviation spark plug gap high voltages and very high currents for certain pulsed power applications, spark plug gap for toyota rav4 such as pulsed lasers, railguns, fusion and ultrastrong pulsed magnetic field research.
		These often have higher 1997 neon spark plug gap power capabilities than any thyristor, thyratron, krytron, or sprytron.
		One such type of switch is known as a trigatron.
	www.inanot.com /Ina-Electronics_Topics_Sk_-_Sy-/Spark_gap.html (1143 words)

	Krytron@Everything2.com
		There is a variant of krytron specifically intended for use in environments which are subject to high levels of ionizing radiation.
		The sprytron does away with the 'keepalive' radiation source but also requires a much more powerful triggering pulse, since the current needs to arc directly from anode to cathode rather than traversing an ionized path.
		The sprytron is able to handle larger inline loads and is slightly faster in some phases of operation than the krytron, but its requisite higher triggering pulse means that the krytron is still preferred for secondary switching operations.
	www.everything2.com /index.pl?node_id=1118172 (0 words)

	Switches
		It is interesting to note that in application circuits(references 1 and 4) the sprytron is always shown directly switching a load (an Exploding bridge Wire.) and a Krytron is always shown triggering a secondary device such as a triggered spark gap.
		All work similarly to the emiconductor Thyristor, one difference being that in many designs (Hydrogen Thyratrons are a common exception) the gate must be biased highly negative in the off state and then biased positive to achieve switching.
		These devices may match for exampleKrytrons and Sprytrons in terms of electrical performance, but not in terms of size and (in the case of the Sprytron) radiation hardness.
	www.pulsedpower.net /Info/Pulsed_Power_Switches/Switches.htm (0 words)

	Sandia National Laboratories - Labs Accomplishments
		By optimizing the laser focus and the Sprytron design, researchers reduced the laser energy required by a factor of 1,000 to 10 micro-joules.
		This allowed the research team to demonstrate triggering of a Sprytron through an optical fiber using a microlaser developed in Division 1000.
		The Stronglink Safety Tester: The first tester, uniquely designed to evaluate the state of health of aging safety components in the enduring stockpile, was successfully qualified at the Sandia Weapons Evaluation Test Laboratory in Amarillo, Texas.
	www.sandia.gov /LabNews/LN02-11-00/la00/nuclear_story.htm (2579 words)

	Cold Cathode Tubes (Site not responding. Last check: 2007-10-29)
		Nixie tubes too are cold cathode neeon displays that also happen krytron sprytron and ignitron tubes.
		Nixie tubes too are cold cathode noen displays that also happen krytron sprytron and ignitron tubes.
		Nixie tubes too are cold cathode non displays that also happen krytron sprytron and ignitron tubes.
	tbbs.corluge.com /cold-cathode-tubes.html (0 words)

	Question for The Mad Scientist
		Development of sprytrons was caused by the fact krytrons tended to be susceptible to fire not only with the trigger pulse, but also if they were hit by a flash of ionizing radiation, common for nearby nuke detonations.
		(Which was a necessary condition to survive intact for the planned full-blown nuclear war.) Sprytrons are also less sensitive to the ionizing radiation from the bomb's core itself (and other parts, like the tritium gas reservoirs), which increases reliability.
		I personally think that all the fuzz with embargoing krytrons (and making problems to my university friends who use them for triggering their laser experiments) would be eliminated if someone would test synchronous detonating of several charges using a laser beam.
	www.adequacy.org /diaries/stories/2002.9.10.13210.3394.html (2301 words)

	Multi-stage high voltage solid state switch - Patent 7072196
		More particularly, the invention pertains to triggering a high voltage solid state switch comprised of a set of solid state devices connected in series.
		Spark gap, krytron, thyratron, sprytron, and other high voltage switches are used in many military, research, medical, and commercial applications where switching of tens of kilovolts and thousands of amperes is required.
		These switches would be used as replacements for spark gap, krytron, thyratron, sprytron, and other high voltage switches used in pulsed power systems for electromagnets, lasers, ion sources, X-ray sources, medical equipment, crowbars, and other applications.
	www.freepatentsonline.com /7072196.html (3130 words)

	Pulse Power Switching Devices
		Although it is usually stated that Krytrons were the devices sought in smuggling involving Israel, Iraq and Pakistan, it may well be that Sprytrons were involved with at least some of these cases, rather than the gas filled krytron, due to the very similar size and performance coupled with very high radiation resistance.
		Even a few tenths of a second can be vital if the target is such that it requires a very precisely timed detonation.
		This may just be coincidence, but as there is no apparent reason why a sprytron couldn't be used in either role, it also occurs to me that possibly such a design might be significant in the design of nuclear warheads, certainly this would appear to be a useful combination (see section 4).
	www.nuclearweaponarchive.org /Library/Pasley1.html (4741 words)

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