Darth Wong wrote:Marc Xavier wrote:To be entirely honest, I've yet to find a cohesive explanation which explains the inner workings of "beam theory."
The AOTC ICS describes it quite clearly. One must completely discard its explanation (which is quasi-canon, by the way) in order to subscribe to a "plasma bolt" theory.
I would disagree on this point. I'll explain why:
The quote, as I understand it, reads as follows:
Episode II Incredible Cross-Sections wrote:Energy weapons fire invisible energy beams at lightspeed. The visible 'bolt' is a glowing pulse that travels along the beam at less than lightspeed...The light given off by visible bolts depletes the overall energy content of a beam, limiting its range. Turbolasers gain a longer range by spinning the energy beam, which reduces waste glow.
Now, I'll break it down.
E2ICS says:
Energy weapons fire invisible energy beams at lightspeed.
These are the containment tubes which hold the turbolaser bolt together as it travels over the long distances to it's target. Larger versions of these tubes were used to encase the devastating energy bolts from the DEATH STAR's tributary beams (see:
A New Hope).
E2ICS says:
The visible 'bolt' is a glowing pulse that travels along the beam at less than lightspeed
The bolt is a glowing pulse of plasma, surrounded by a liquid wall, that travels through the containment tubes at less that lightspeed. It emits light transversely through stimulated emission of photons along a desired wavelength (such as red, purple, orange, or green). This is why it's referred to a "laser" bolt in the movie novelizations and other sundry EU novels, such as
The Bacta War,
Agents of Chaos I - Hero's Trial,
Shadows of the Empire and others.
E2ICS says:
The light given off by visible bolts depletes the overall energy content of a beam, limiting its range
The light emitted by the bolt bleeds off some of it's energy into the containment tube, causing some of the energy that was originally in the turbolaser bolt to strike a target before the bolt actually arrives.
This effect, although interesting, is actually a
misfire of the turbolaser weapon (which explains it's rarity). Not all of the energy which bleeds off of the bolt is absorbed into the tube, and the energy which
is transferred into the tube actually
disrupts it. This means that the tube cannot remain coherent over as long as a distance, and it's range is hampered.
E2ICS says:
Turbolasers gain a longer range by spinning the energy beam, which reduces waste glow.
Spinning the containment tube around the bolt actually facilitates the generation some extra spin-sealed tibanna.
Spin-sealing, according to
Galaxy Guide 2: Yavin and Bespin, is a process which involves subjecting certain gasses to intense pressures and temperatures as to alter it's chemical properties. This process will often produce products which intensify the energy of light that is passed through them.
In addition, the TOT forwards that:
Turbolaser Operational Theory wrote:Spin-sealing actually also helps to purify the gas and transforms some of the tibanna into a slightly different substance. This transformed tibanna has different properties than the rest of the tibanna (a much higher heat of vaporization, for one). When spin-sealed tibanna is excited by enough energy from a power source, the transformed tibanna tends to diffuse out from the rest of the tibanna, forming a contiguous layer that comes to rest on the surface of the plasmatic mass.
Once you already have spin-sealed tibanna and you expose that turbolaser bolt to high temperatures (as you pumped it full of energy in the actuation chamber before it was launched) and pressures (by spinning the tube around the bolt, increasing the centripetal force which contains it), you actually cause
more of the tibanna to transform into the substance that forms the liquid wall. In other words, the wall thickens and more light is absorbed by it, and the amount of waste glow is reduced. This means that spinning the containment tube will actually reduce the amount of light given off by the bolt, and hence allow the containment tube to remain intact over longer distances.
Darth Wong wrote:The other official references describe plasma being part of the turbolaser's mechanism but they do not specifically state that the plasma is launched out of the barrel as the bolt.
Source:
The Official Star Wars Fact File: Turbolasers
"At the point of discharge, the magnetic seal at the mouth of the containment chamber releases, and a ring pulse guides and accelerates the excited atoms along the barrel and out of the apparatus. The visible effect is a condensed bolt of green, glowing plasma, directed at high velocities (although nowhere near the speed of light) toward a target. Less refined or impure Tibanna will yield different colour bolts, ranging anywhere from red to blue to green."
Also note: Source:
The Official Star Wars Fact File: Turbolasers
"The mechanism of a turbolaser is not all that dissimilar to that of a hand blaster."
The two quotes below concern blaster weapons, not turbolasers. However, given the quote above, I cite them as relevant.
Star Wars Visual Dictionary wrote:Common blaster weapons use high-energy gas for ammunition, activated by a power cell and converted into plasma. The plasma is released from a magnetic bottle effect to fire through collimating components as a coherent energy bolt. Inherent instabilities limit the ability to precisely aim a blaster bolt, but knowing one's weapon well can strengthen marksmanship. Plasma energy is dissipated as the bolt travels, limiting range as the energy as the energy becomes incoherent. Longer range is developed by longer blast tubes, which align the plasma carrier waves more closely through additional galven circuitry, lens crystals, or other collimating devices.
AOTC Visual Dictionary wrote:Clone troopers are issued plasma guns of two types. Like all standard blaster weapons, these guns create a charged plasma bolt using a small amount of Tibanna gas. Blaster weapons free clone troopers from the need to carry projectile ammunition but are notoriously hard to aim due to the inherent instability of plasma bolts.
Darth Wong wrote:In fact, it appears to be used in the inner mechanism and is discharged out the barrel as waste material (see below):
The Turbolaser Operational Theory would explain those globs as a partial misfire of the weapon (I don't believe the globs are often seen outside of this instance). Some of the tibanna either stuck to the bottom of the barrel, or for some reason (perhaps it was not highly charged enough) it was not accelerated as quickly out of the barrel and basically "floundered" below the actual main bolt.
According to
The Official Star Wars Fact File article on Turbolasers, the weapons shoot plasma in a condensed, glowing green bolt, not as "waste material."
Darth Wong wrote:The current beam theory is based on the AOTC ICS which states that turbolasers fire lightspeed particles, and that the visible "bolt" is some sort of rider on a carrier wave (if you look at the DS superlaser, you can see these pulses moving along the beam). The delay before damage would be caused by a slight power ramp-up delay in the weapon, which would explain why the bolts seem to go slower or faster depending on how far away the target is.
Indeed, I do recall the pulses moving along the tributary beams (and the main beam if I recall correctly).
However, I don't exactly understand the whole concept you're explaining. The "wavelength" of the beam would be directly proportional to the distance?
How does this theory account for laser bolts that travel along a different vector than where the barrel is pointing? An entirely different weapon?
Darth Wong wrote:Is there any directly visible indication of an actual projectile inside of ground-based blaster cannons and handheld blasters?
It is just one of several possible theories, but the projectile is presumably very, very small for a hand blaster. A tank gun's projectile would be considerably larger.
I understand. Is there an example where such a projectile is directly observed?
Darth Wong wrote:If I understand the theory correctly, there should be some sort of "glowing projectile" in the center of this bolt.
Why should the projectile itself glow strongly?
Because
Illuminatus Primus is the one who suggested it.
Darth Wong wrote:I would note that those glowing fragments falling from the impacts at the Gungan shield can also be explained by the TOT.
No they can't. A cylindrical containment beam will not form "fragments", and you admit as much. So you resort to surface tension from your liquid outer shell in order to briefly hold the bolt together. Unfortunately, this idea fails on numerous levels. If the plasma core contains enough energy to blow huge chunks out of concrete walls upon impact, it contains enough energy to heat up a liquid shell long before the bolt hits anything. Moreover, liquid surface tension is utterly insignificant next to the expansive pressure of high-temperature gases (need I remind you that high-temperature gases are what propels a battleship shell out of the gun?)
That depends on what the heat of vaporization of the liquid wall is. No
ordinary liquid that we know of would be able to handle the kinds of temperatures and pressures that would be required of Tibanna. If you assume that Tibanna is constrained by the limits of non-exotic matter, then of course you will reject any argument for exotic behaviors or properties.
In an analogous situation, no energy beam process that we know of in real life can account for the blatantly
odd behavior of turbolasers. If you assume that the energy transfer processes of turbolasers are constrained by the limits of modern particle physics, then any physical model used to describe turbolaser bolts becomes nonsensical in that context (see,
Observing the behaviour of turbolasers and blasters) because it requires something outside of our physics.
His Divine Shadow wrote:There is no such thing as proving what they are with todays science, asking for it is nonscensial.
The TOT presupposes an exotic surface tension strong enough to hold together these globs for that short amount of time.
Darth Wong wrote:While the hand blaster issue is still somewhat inconclusive, the falling fragments from the Gungan shield definitely suggest some sort of physical projectile coming from that tank gun.
The glowing construct that the TOT provides is a physical projectile.
Darth Wong wrote:If it is explicitly stated that turbolasers and hand blasters must use the same mechanism, then provide the quote. Otherwise, it sounds like you're overanalyzing an implication, and ignoring direct evidence.
New evidence, cited from the
Official Star Wars Fact File, Turbolasers:
"The mechanism of a turbolaser is not all that dissimilar to that of a hand blaster. When a blaster is fired, a small volume of high-energy gas moves from the gas chamber to a conversion enabler, commonly called an XCiter. There, energy from the weapon's power source excites the gas. In the case of hand-held weapons, this is achieved with a small power pack, which a reactor or power generator is necessary with larger weapons. The excited gas passes into an actuating blaster module, where it is processed into a beam of intense energy particles, coupled with light."
"At the point of discharge, the magnetic seal at the mouth of the containment chamber releases, and a ring pulse guides and accelerates the excited atoms along the barrel and out of the apparatus. The visible effect is a condensed bolt of green, glowing plasma, directed at high velocities (although nowhere near the speed of light) toward a target. Less refined or impure Tibanna will yield different colour bolts, ranging anywhere from red to blue to green."
"A PLASMA: Imperial turbolaser technology uses intensely focused lasers to energize compact pockets of Tibanna gas until the weak molecular bonds of the gas break down. Once that occurs, a second beam of photons is introduced. This excites the free molecules to such a high temperature that the electrons on the individual atoms break away and form plasma. These pockets of plasma are retained in a small magnetic bottle at the base of the turbolaser barrel, until the moment the weapon discharges."
Bryan Young's exact quote:
The controversial EGW&T states that TL technology and blaster technology are similar and describes the firing process this way:
When a blaster is fired, a small amount of high-energy blaster gas moves from the gas chamber to the gas conversion enabler (commonly called an XCiter). There the gas is excited by energy from the weapon's power source, which is a small power pack for hand weapons and a reactor or a power generator for a larger weapon. The excited gas passes into the actuating blaster module, where it is processed into a beam comprised of intense energy particles coupled with light.
In addition to the
Official Fact File information, Bryan Young says that the
Essential Guide to Weapons and Technology states that "TL technology and blaster technology are similar". Is his statement incorrect?
Darth Wong wrote:Didn't you notice that if hand blaster bolts don't detonate on contact they ricochet cleanly (DS trash compactor, TPM hangar bay), while if turbolasers don't detonate on contact they splinter (Tantive IV, X-wing engine)?
Yes. The
Imperial Deflector Shield Operational Theory addresses this issue in describing the behavior and characteristics of magnetic field deflectors.
The following exchange from the Death Star trash compactor scene in
A New Hope is important:
After they land in the compactor:
Han: ...what an incredible smell you've discovered!
Leia: (makes a face)
Han: Let's get outta here... (hoists up his gun and points it at the wall) (to chewie) get away from there.
Luke: No, wait!
Han: (shoots his blaster, causing a small crisis as it bounces around the walls)
After the bolt stops bouncing:
Luke: Would you forget it I already tried it, it's magnetically sealed!
Leia: Put that thing away or you're gonna get us all killed!
This bouncing effect would be a result of the charged particles in the bolt interacting with a magnetic seal in the trash compactor's walls. It is possible that something similar was afoot (although I would need to review the TPM scene) in the hanger bay instance that you mention.
From
Bryan Young's Turbolaser Commentaries:
"It is also interesting to note that blaster rifle bolts seem to be deflected by magnetism. In the A New Hope garbage-chute scene, Luke explains to Han that the chute is 'magnetically sealed' after his blaster bolt ricochets several times . . . Of course, the door was magnetically sealed, which prevented it from being 'knocked down.' Perhaps the bolt ricocheted on the armor, and the magnetic seal has no bearing on the bolt's path."
The Tantive-IV incident was the actual ship's shield dealing with the turbolaser bolt, as the Imperial Deflector Shield Operational Theory explains:
Imperial Deflector Shield Operational Theory wrote:In a best-case scenario, a ray shield will reflect a [turbolaser] bolt entirely by effectively "bouncing" the confinement beam away from the ship and shunting the plasma along another vector and into open space. The shield achieves this through the use of a series of carefully angled and controlled ultrathin electrostatic repulsion fields. Given that the fields are perfectly angled and the weapon being deflected is not too powerful, a ray shield can toss away fire without taxing its energy reserves. But the heavier a bolt is, the stronger a confinement tube is required to hold it, and in some cases the ray shields are not strong enough or angled correctly to effectively turn an offending confinement beam away.
In such a case, a second alternative comes into play. If a shield is not powerful enough (or not angled exactly) to bounce a bolt along a harmless trajectory, the shield may actually compensate by splintering the confinement beam into a series of smaller and more manageable sub-tubes.
As for the X-Wing situation (which I went over in the post I made on Mon Jul 28, 2003 at 8:38 pm), that is not a splintering effect as seen on the Tantive IV (for the reasons stated in that post).
Darth Wong wrote:The EGWT suggests that blasters and turbolasers might be based on the same principle. However, it is hardly explicit,
Is Bryan Young's statement incorrect? Also, see the
Official Star Wars Fact File information cited above.
Darth Wong wrote:and the canon ANH novelization states quite clearly that the DS used "explosive solids" as part of its defensive weaponry.
A New Hope, novelization:
Imperial efficiency was in the process of compensating for this strategic oversight. Soldiers scrambled to man enormous defensive-weapons emplacements. Servodrivers thrummed as powerful motors aligned the huge devices for firing. Soon a web of annihilation began to develop the station as energy weapons, electrical bolts, and explosive solids ripped out at the oncoming rebel craft.
The novel appears to be describing three different weapons systems, here. Energy weapons, electrical bolts and explosive solids (presumably missiles). This doesn't appear to have anything to do with turbolasers.
Incidentally, the "explosive solids" could possibly be the "shadow bombs" mentioned in
Star by Star and could be used to provide a possible explanation for the instances in Star Wars where "flak" explosions are seen without an actual turbolaser.
Now, I will pose a few questions.
If this is a lightspeed beam weapon (but not a laser), why does it most often cause damage at speeds lower than light (when the bolt hits)?
Why are bolts sometimes opaque?
Why are turbolasers so often referred to as lasers by narrative and even technical sources?
See:
Star Wars II: Attack of the Clones Novelization,
A New Hope Novelization,
Empire Strikes Back Novelization,
Return of the Jedi Novelization,
Destiny's Way,
The Bacta War,
Shadows of the Empire,
Enemy Lines II - Rebel Stand,
The Krytos Trap,
Essential Guide to Weapons and Technology,
Star Wars Sourcebook
Why are turbolasers often more bulbous at the front end and tapering at the back end?
See: Bryan Young's Turbolaser Commentaries
How can a laser bolt explode?
Empire Strikes Back Novelization wrote:Lando opened the upper hatch. In the distance he glimpsed the three TIE fighters approaching the Falcon, their laser guns brightening the twilight sky with streaks of hot destruction. Lando stretched his body out of the hatch and reached to grasp the battered warrior and pull him inside the ship. Just then Falcon lurched as a bolt exploded near it, and almost threw Luke's body overboard. But Lando caught his hand and held on tightly.
See also:
The ship was rocked again by the concussion of another laser explosion.