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Chinese laser gun which burns flesh from half a mile away 'perfect for assassins'
- Thread starter Reptile
- Start date
i am not so sure.
here is a laser diode putting out 75 watts at 16 V and 40 amps for a .1% duty cycle.
QL90X8SM InGaAs Laser Diode Quantum Semiconductor International Co., Ltd.
Power combine 10 of those with a fiber optic combiner...and you are talking some serious optical power.
400 Amps from a lithium ion battery for a short duration pulse is not a big deal. Toss one of these into a backpack
and some simple switching circuitry, and away you go.
You would probably need some water cooling system for the laser diode...but something like the water coolers they use in high end gaming computers and a fan powered radiator...and away you go.
So it is possible to put 750 watts on target for a 0.1 % duty cycle for 100 nS.
The question is....what is the achievable pulse repetition rate (limited by how much heat you can dissipate from that diode), and will such a short pulse, with enough repetitions, kill a target? THAT i can not tell you
But it IS starting to sound like a "phased plasma rifle in the 40 watt range"
You would probably have to wear your sunglasses too!
An option....if you time division staggered when those 10 diodes fired, you would get more like a 75 watt optical output at a virtual 1% duty cycle. Or maybe fiber optic combine 20 or 40 diodes....10 in a pod into two two-way optical combiners for 300 watts at 1 % duty cycle.
Fiber optic power combiners can EASILY handle these types of power levels, as long as the fusion splices are precise and you do not loose any power to the cladding material
here is a laser diode putting out 75 watts at 16 V and 40 amps for a .1% duty cycle.
QL90X8SM InGaAs Laser Diode Quantum Semiconductor International Co., Ltd.
Power combine 10 of those with a fiber optic combiner...and you are talking some serious optical power.
400 Amps from a lithium ion battery for a short duration pulse is not a big deal. Toss one of these into a backpack
and some simple switching circuitry, and away you go.
You would probably need some water cooling system for the laser diode...but something like the water coolers they use in high end gaming computers and a fan powered radiator...and away you go.
So it is possible to put 750 watts on target for a 0.1 % duty cycle for 100 nS.
The question is....what is the achievable pulse repetition rate (limited by how much heat you can dissipate from that diode), and will such a short pulse, with enough repetitions, kill a target? THAT i can not tell you
But it IS starting to sound like a "phased plasma rifle in the 40 watt range"
You would probably have to wear your sunglasses too!
An option....if you time division staggered when those 10 diodes fired, you would get more like a 75 watt optical output at a virtual 1% duty cycle. Or maybe fiber optic combine 20 or 40 diodes....10 in a pod into two two-way optical combiners for 300 watts at 1 % duty cycle.
Fiber optic power combiners can EASILY handle these types of power levels, as long as the fusion splices are precise and you do not loose any power to the cladding material
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pseudonomen137's JScript Diameter Calculator
Laser spot size calculator based on initial diameter and beam divergence in milirads. This does not include diffraction effects, which are somewhat dependent on wavelength.
So a 7mm beam with .1 mrad divergence makes a 37 mm spot at 1000 feet. At lunar distances the spot is 132 thousand feet.
Practically, punching an energetic beam through atmosphere creates its own problems. The air getting heated along the beam path makes its own "mirage" effect where the air itself becomes a wobbly lens, spreading the beam out.
Laser spot size calculator based on initial diameter and beam divergence in milirads. This does not include diffraction effects, which are somewhat dependent on wavelength.
So a 7mm beam with .1 mrad divergence makes a 37 mm spot at 1000 feet. At lunar distances the spot is 132 thousand feet.
Practically, punching an energetic beam through atmosphere creates its own problems. The air getting heated along the beam path makes its own "mirage" effect where the air itself becomes a wobbly lens, spreading the beam out.
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Where’s Skysoldier? Didn’t he prototype very heavy duty laser power supplies for a living?
quincy
NES Member
Maybe a high power focused gamma ray rifle would be better. You could pulse a small piece of plutonium in and out of critical mass flashover and you wouldn’t need much more than a few D cells to power the electronics. At least that’s what Elon Musk told me.
Double check my calculations.
Double check my calculations.
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If that thing works house cats are going to go extinct.
MisterHappy
NES Member
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namedpipes
NES Member
Tom Swift and His Electric Rifle; Or, Daring Adventures in Elephant Land
CHAPTER I
“Have you anything special to do to-night, Ned?” asked Tom Swift, the well-known inventor, as he paused in front of his chum’s window, in the Shopton National Bank.
“No, nothing in particular,” replied the bank clerk, as he stacked up some bundles of bills. “Why do you ask?”
“I wanted you to come over to the house for a while.”
“Going to have a surprise party, or something like that?”
“No, only I’ve got something I’d like to show you.”
“A new invention?”
“Well, not exactly new. You’ve seen it before, but not since I’ve improved it. I’m speaking of my new electric rifle. I’ve got it ready to try, now, and I’d like to see what you think of it. There’s a rifle range over at the house, and we can practice some shooting, if you haven’t anything else to do.”
“I haven’t, and I’ll be glad to come. What are you doing in the bank, anyhow; putting away more of your wealth, Tom?”
“Yes, I just made a little deposit. It’s some money I got from the government for the patents on my sky racer, and I’m salting it down here until Dad and I can think of a better investment.”
“Good idea. Bring us all the money you can,” and the bank clerk, who held a small amount of stock in the financial institution, laughed, his chum joining in with him.
“Well, then. I’ll expect you over this evening,” went on the youthful inventor, as he turned to leave the bank.
“Yes, I’ll be there. Say, Tom, have you heard the latest about Andy Foger?”
“No, I haven’t heard much since he left town right after I beat him in the aeroplane race at Eagle Park.”
“Well, he’s out of town all right, and I guess for a long time this trip. He’s gone to Europe.”
“To Europe, eh? Well, he threatened to go there after he failed to beat me in the race, but I thought he was only bluffing.”
“No, he’s really gone this time.”
“Well, I, for one, am glad of it. Did he take his aeroplane along?”
“Yes, that’s what he went for. It seems that this Mr. Landbacher, the German who really invented it, and built it with money which Mr. Foger supplied, has an idea he can interest the German or some other European government in the machine. Andy wanted to go along with him, and as Mr. Foger financed the scheme, I guess he thought it would be a good thing to have some one represent him. So Andy’s gone.”
“Then he won’t bother me. Well, I must get along. I’ll expect you over to-night,” and with a wave of his hand Tom Swift hurried from the bank.
The young inventor jumped into his electric runabout which stood outside the institution, and was about to start off when he saw a newsboy selling papers which had just come in from New York, on the morning train.
“Here, Jack, give me a TIMES,” called Tom to the lad, and he tossed the newsboy a nickel. Then, after glancing at the front page, and noting the headings, Tom started off his speedy car, in which, on one occasion, he had made a great run, against time. He was soon at home.
“Well, Dad, I’ve got the money safely put away,” he remarked to an aged gentleman who sat in the library reading a book. “Now we won’t have to worry about thieves until we get some more cash in.”
“Well, I’m glad it’s coming in so plentifully,” said Mr. Swift with a smile. “Since my illness I haven’t been able to do much, Tom, and it all depends on you, now.”
“Don’t let that worry you, Dad. You’ll soon be as busy as ever,” for, following a serious operation for an ailment of the heart, Mr. Swift, who was a veteran inventor, had not been able to do much. But the devices of his son, especially a speedy monoplane, which Tom invented, and sold to the United States Government, were now bringing them in a large income. In fact with royalties from his inventions and some gold and diamonds which he had secured on two perilous trips, Tom Swift was quite wealthy.
“I’ll never be as busy as I once was,” went on Mr. Swift, a little regretfully, “but I don’t know that I care as long as you continue to turn out new machines, Tom. By the way, how is the electric rifle coming on? I haven’t heard you speak of it lately.”
“It’s practically finished, Dad. It worked pretty well the time I took it when we went on the trip to the caves of ice, but I’ve improved it very much since then. In fact I’m going to give it a severe test to-night. Ned Newton is coming over, and it may be that then we’ll find out something about it that could be bettered. But I think not. It suits me as it is.”
“So Ned is coming over to see it; eh? You ought to have Mr. Damon here to bless it a few times.”
“Yes, I wish I did. And he may come along at any moment, as it is. You never can tell when he is going to turn up. Mrs. Baggert says you were out walking while I was at the bank, Dad. Do you feel better after it?”
“Yes, I think I do, Tom. Oh, I’m growing stronger every day, but it will take time. But now tell me something about the electric gun.”
Thereupon the young inventor related to his father some facts about the improvements he had recently made to the weapon. It was dinner time when he had finished, and, after the meal Tom went out to the shed where he built his aeroplanes and his airships, and in which building he had fitted up a shooting gallery.
“I’ll get ready for the trial to-night,” he said “I want to see what it will do to a dummy figure. Guess I’ll make a sort of scarecrow and stuff it with straw. I’ll get Eradicate to help me. Rad! I say, Rad! Where are you?”
“Heah I is, Massa Tom! Heah I is,” called a colored man as he came around the corner of a small stable where he kept his mule Boomerang. “Was yo’-all callin’ me?”
“Yes, Rad, I want you to help make a scarecrow.”
“A scarecrow, Massa Tom! Good land a’ massy! What fo’ yo’ want ob a scarecrow? Yo’-all ain’t raisin’ no corn, am yo’?”
“No, but I want something to shoot at when Ned Newton comes over to-night.”
“Suffin t’ shoot at? Why Massa Tom! Good land a’ massy! Yo’-all ain’t gwine t’ hab no duel, am yo’?”
“No, Rad, but I want a life-size figure on which to try my new electric gun. Here are some old clothes, and if you will stuff them with rags and straw and fix them so they’ll stand up, they’ll do first-rate. Have it ready by night, and set it up at the far end of the shooting gallery.”
“All right, Massa Tom. I’ll jest do dat, fo’ yo’,” and leaving the colored man to stuff the figure, after he had showed him how, Tom went back into the house to read the paper which he had purchased that morning.
He skimmed over the news, thinking perhaps he might see something of the going abroad of Andy Foger with the German aeroplane, but there was nothing.
“I almost wish I was going to Europe,” sighed Tom. “I will certainly have to get busy at something, soon. I haven’t had any adventure since I won the prize at the Eagle Park aviation meet in my sky racer. Jove! That was some excitement! I’d like to do that over again, only I shouldn’t want to have Dad so sick,” for just before the race, Tom had saved his father’s life by making a quick run in the aeroplane, to bring a celebrated surgeon to the invalid’s aid.
“I certainly wish I could have some new adventures,” mused Tom, as he turned the pages of the paper. “I could afford to take a trip around the earth after them, too, with the way money is coming in now. Yes, I do wish I could have some excitement. Hello, what’s this! A big elephant hunt in Africa. Hundreds of the huge creatures captured in a trap—driven in by tame beasts. Some are shot for their tusks. Others will be sent to museums.”
He was reading the headlines of the article that had attracted his attention, and, as he read, he became more and more absorbed in it. He read the story through twice, and then, with sparkling eyes, he exclaimed:
“That’s just what I want. Elephant shooting in Africa! My! With my new electric rifle, and an airship, what couldn’t a fellow do over in the dark continent! I’ve a good notion to go there! I wonder if Ned would go with me? Mr. Damon certainly would. Elephant shooting in Africa! In an airship! I could finish my new sky craft in short order if I wanted to. I’ve a good notion to do it!”
MisterHappy
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Pipes: If you read the book, you'll find that when he goes to Africa to hunt the elephants, he disintegrates the first one, because the rifle's output is set too high.
Also, this it the origin of TASER: Thomas A Swift's Electric Rifle
Also, this it the origin of TASER: Thomas A Swift's Electric Rifle
fencer
NES Member
Oh boy. Could you imagine publishing something like that today? Racism, animal cruelty, elitism. I have a feeling it would not make the best sellers list.
Chevy 2 65
NES Member
Kid has a very bright future !
AHM
NES Member
She can't(*),
and I already have a license:
CFR Title 47: Telecommunication
PART 97—AMATEUR RADIO SERVICE - Updated March 5, 2018
...
Subpart D—Technical Standards
§97.301 Authorized frequency bands.
The following transmitting frequency bands are available to an
amateur station located within 50 km of the Earth's surface,
within the specified ITU Region, and outside any area where the
amateur service is regulated by any authority other than the FCC.
(a) For a station having a control operator who has been granted
a Technician, General, Advanced, or Amateur Extra Class operator
license or who holds a CEPT radio-amateur license or IARP of any
class:
...
Wavelength band: SHF
ITU region 1, GHz: Above 275
ITU region 2, GHz: Above 275
ITU region 3, GHz: Above 275
Sharing requirements see §97.303 (paragraph): (f)
...
§97.303 Frequency sharing requirements.
...
(f) [n/a]
PART 97—AMATEUR RADIO SERVICE - Updated March 5, 2018
...
Subpart D—Technical Standards
§97.301 Authorized frequency bands.
The following transmitting frequency bands are available to an
amateur station located within 50 km of the Earth's surface,
within the specified ITU Region, and outside any area where the
amateur service is regulated by any authority other than the FCC.
(a) For a station having a control operator who has been granted
a Technician, General, Advanced, or Amateur Extra Class operator
license or who holds a CEPT radio-amateur license or IARP of any
class:
...
Wavelength band: SHF
ITU region 1, GHz: Above 275
ITU region 2, GHz: Above 275
ITU region 3, GHz: Above 275
Sharing requirements see §97.303 (paragraph): (f)
...
§97.303 Frequency sharing requirements.
...
(f) [n/a]
(*) City of Rancho Palos Verdes v. Abrams (2002)
...
Given the FCC's statutory authority over frequencies, the United States Supreme Court has stated that "the Commission's jurisdiction over technical matters such as frequency allocation . . . is clearly exclusive." (Head v. New Mexico Board (1963) 374 U.S. 424, 430, fn. 6, italics added.
Emphasis mine.
amm5061
NES Member
She can't(*),
and I already have a license:
CFR Title 47: Telecommunication
PART 97—AMATEUR RADIO SERVICE - Updated March 5, 2018
...
Subpart D—Technical Standards
§97.301 Authorized frequency bands.
The following transmitting frequency bands are available to an
amateur station located within 50 km of the Earth's surface,
within the specified ITU Region, and outside any area where the
amateur service is regulated by any authority other than the FCC.
(a) For a station having a control operator who has been granted
a Technician, General, Advanced, or Amateur Extra Class operator
license or who holds a CEPT radio-amateur license or IARP of any
class:
...
Wavelength band: SHF
ITU region 1, GHz: Above 275
ITU region 2, GHz: Above 275
ITU region 3, GHz: Above 275
Sharing requirements see §97.303 (paragraph): (f)
...
§97.303 Frequency sharing requirements.
...
(f) [n/a]
(*) City of Rancho Palos Verdes v. Abrams (2002)
...
Given the FCC's statutory authority over frequencies, the United States Supreme Court has stated that "the Commission's jurisdiction over technical matters such as frequency allocation . . . is clearly exclusive." (Head v. New Mexico Board (1963) 374 U.S. 424, 430, fn. 6, italics added.
Emphasis mine.
Errr... Wouldn't that apply to radio frequency, not laser energy?
Love Machine
NES Member
Unless there is a small nuke in the stock, no.
DVD players have lasers in them. They will be banned under her "copies and duplicates" scheme.
She can't(*),
and I already have a license:
CFR Title 47: Telecommunication
PART 97—AMATEUR RADIO SERVICE - Updated March 5, 2018
...
Subpart D—Technical Standards
§97.301 Authorized frequency bands.
The following transmitting frequency bands are available to an
amateur station located within 50 km of the Earth's surface,
within the specified ITU Region, and outside any area where the
amateur service is regulated by any authority other than the FCC.
(a) For a station having a control operator who has been granted
a Technician, General, Advanced, or Amateur Extra Class operator
license or who holds a CEPT radio-amateur license or IARP of any
class:
...
Wavelength band: SHF
ITU region 1, GHz: Above 275
ITU region 2, GHz: Above 275
ITU region 3, GHz: Above 275
Sharing requirements see §97.303 (paragraph): (f)
...
§97.303 Frequency sharing requirements.
...
(f) [n/a]
(*) City of Rancho Palos Verdes v. Abrams (2002)
...
Given the FCC's statutory authority over frequencies, the United States Supreme Court has stated that "the Commission's jurisdiction over technical matters such as frequency allocation . . . is clearly exclusive." (Head v. New Mexico Board (1963) 374 U.S. 424, 430, fn. 6, italics added.
Emphasis mine.
Think our bright stars in the legislature will classify light as ammo under ma law?
namedpipes
NES Member
I read it like 40 years ago
![[laugh]](/xen/styles/default/xenforo/smilies.vb/012.gif "Laugh [laugh]")
Barely remember it. Although I liked the TS Jr. series a little better.Maybe I'll throw it on the text-to-speech reader for tomorrow's commute.
AHM
NES Member
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