abstract
| - The type 3 is a rifle version of the phaser weapon. The standard model as used in the mid 2360s used a somewhat similar ""business end"" as the type 2 then in service. It had 16 beam settings, with a fully autonomous recharge system. The weapon was gyrostabilised and had multiple target acquisition capability. Compared to the type 2 the weapon had a 50% greater energy reserve, but was no more powerful. By 2373 the type 3 had been fitted with a modified targeting unit. Compression Phaser Rifle : The compression phaser rifle was in service in the early 2370s. When the Dominion threat became urgent in late 2370, Starfleet decided to issue its forces with a new class of heavy rifles to increase the firepower available to them. The Modern Phaser Rifle project would evaluate two competing designs, the Heavy phaser rifle and the Compression phaser rifle. Both would be rushed into service as fast as possible. The Compression rifle concentrated on simplicity. The LiCu 521 discharge crystal was doped with arsenic atoms and trisilinate molecules in order to restrict the phaser energy discharge. The doping materials diverted a small part of the discharging energy to re-establish the charge barrier between the discharge crystal and the Sarium kelleride power crystal, limiting or compressing the beam to a maximum of 200 picoseconds of firing. This would fire the entire energy discharge in a beam of only 6 centimetres length, greatly increasing the intensity of the energy and so enhancing the effect on the target. Although it was by far the simpler of the two weapons, great difficulties were encountered during the development of the compression rifle. Most of these centred around thermal damage to the discharge crystal resulting from the very high energy intensities flowing through it. Average firing lifetime of an emitter crystal in the first model developed was only 9.6 nanoseconds - 48 discharges - a far from acceptable figure. Redesign of the shape of the emitter boosted this figure to 28 nanoseconds, still not sufficient for a field weapon. The solution arrived at was to install two high capacity cooling systems, one mounted on either side of the rifle. This boosted the emitter crystals lifetime to 600 nanoseconds, or 3,000 discharges. Starfleet deemed this just about acceptable and rushed the compression rifle into limited service. The weapon was never satisfactory - although the cooling systems worked reasonably well they made the weapon heavy and difficult to use properly at long ranges. The emitter crystal was also rather sensitive to adverse environmental conditions, and if not treated carefully cracking could occur - a breakdown which would lead to a thermal explosion on the next discharge. Although it was issued to some ground forces units and to the four units of the Intrepid class Starship then in service, several thermal explosion accidents forced Starfleet to withdraw the compression rifle shortly after it entered service in 2371. None now remain in use. The weapon has been produced in at least two variants; one with duranium alloy metal stiffening on the barrel and one without.
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