Idea number 507

The TIS-1 man-portable military laser is an interesting concept: a reservoir of helium, heated by radioactive decay, releases its helium through a vortex tube into a resonant cavity. The vortex created by the flow of helium causes a population inversion among the helium atoms, which in turn stimulates the release of photons of a common wavelength. With enough helium atoms flowing, you get enough energy resonating in the cavity to emit through one end and damage something.



When the helium flow peters out, the laser shuts down. You have to cool and recompress the helium, then reheat it, to get another blast.



It has its limitations, in that your soldiers will be humping the ruck with compressed gas tanks full of dangerous alpha emitters, and sizeable radiators that will disclose their locations to thermal imagers. There might also be a tactically intolerable delay before a discharged weapon recharges for another blast.



Regular readers of WUTT! will recall that all things weapon-y are appreciated as Things of Beauty here, but sometimes we must consider gathering stones together instead of casting them away.



We also assert that our future is in space, and we have to develop economically feasible ways to explore, exploit, and populate it. Getting out of the atmosphere is one problem to solve, moving about efficiently among the planets is another. With capitalist solutions to the first problem within our grasp, let us turn our attention to the second. We need flight times to Mars and the Asteroid belt on the order of weeks rather than months. I am told the principal means to do that is to separate the problems of power production on the one hand, and generation of thrust on the other. You'll need less thrust if you use only enough to propel your payload, rather than propel your payload plus the power plant itself. Offload the power production and achieve economies of scale with it. Send that power to ships that need only enough to push the payload.



Take that same TIS-1 weapon to the Moon and beat it into a plowshare. Use ammonia or CO₂ as the working gas instead of helium. Heat the working gas in solar collectors instead of using fissionable material; we'll need that stuff for future platforms farther away from sunlight.



Make the vortex tube very big, and make a few hundred of them. Mount them on pan-tilt heads slaved to an aiming system. Connect their exhausts to a large radiator to eliminate the remaining heat. The radiators could be located at the Moon's poles or mounted at the bottom of deep narrow trenches to minimize sunlight striking them.



Build the ships to be propelled not by the impingement of photons upon their sails, but by ion motors. The sails will carry large arrays of antennas to collect the microwaves from these lasers and convert them to electricity to power the ion motors.



With a large enough reservoir of masing gas, and a large enough network of radiators and compressors, it may be possible to aim multiple masers continuously at a flight of ships, providing them with constant thrust for days or even weeks, until they are out of range. It will also be possible to beam power to ships that are approaching, to help them decelerate as they reach their destination instead of relying on the nerve-wracking technique of aerobraking. The power to create the thrust will be completely unrelated to the direction of the thrust.



There are always details to be worked out. Will the ion propulsion exhaust reflect or diffract the incoming microwave beam to the extent that range or power is impaired? Will the flow of hundreds of tons of gas through the gasdynamic maser system set up vibrations that make aiming impossible, either for a Lunar platform or a Martian-orbiting one? Will the vortex tube or the cavity wear out? How much of this system can be built from Lunar materials, or will it all have to be boosted to orbit? Can this system be used to loft an X-prize type vehicle the rest of the way to orbit, or will even that thin upper atmosphere attenuate and spread the beam too much?



Update: The massive gasdynamic maser will also come in handy for dealing with these pesky Earth-crossing roids.

We can neither confirm nor deny . . .

. . . that we may now or in the future have received our Colorado CCW, in accordance with Colorado's Revised Statutes section 18-12-201 et seq.



If we have or are about to, it will have been or will be among the low three-hundreds of those issued this year in Douglas County. That puts the per-capita of CCWs for Douglas County rather low, a totally wild-assed guess of .4 percent of total population, as Blog O'Stuff has observed (Hat tip to Renaissance man James Rummel).



The duration of such a CCW permit is five years from date of issue. The application-to-approval process can have taken 60-plus days. The permit itself is prepared on the day that that the application is submitted, and the fingerprints and photograph taken, thus it is technically "issued" on that day, but the you the applicant cannot take possession of it until the approval grinds around and you get your phone call from the Sheriff's office inviting you to come pick it up.



So the useful "life" of the permit is five years minus about 60 days. I couldn't find anything about that in the relevant CRS so I won't cry foul. Note also that the hours when applications are accepted are rather circumscribed. But overall, DCSO does not screw with applicants.

Why the LP should abandon Presidential campaigns

The Quilt.



Hat tip to Jed at FreedomSight.

Toad repair

Toad, Barbaloot and I are holed up in Children's Hospital, getting Toad his palatoplasty and two tympanotomies. All went well, though Toad looks like he went through a round with Tyson, then a tequila hangover.



Much catching up to do. I have Days Off so it's worthwhile for all seven of my regular readers to start checking in again.

Tanned, rested and ready for Senate campaign?

New post on Social Security privatization over here.

Fish. Barrel. Bang.

Hip-hop is too target-rich an environment for Weird Al.

Quote for the day

Roughly $822 million was spent in support of President Bush in 2004, compared to $925 million spent on behalf of Sen. John Kerry.



So much for two of the fundamental lies behind campaign-finance reform. One, that McCain-Feingold, or any other piece of legislation, can "get money out of politics." Two, that "money rules." It turns out that sometimes, strangely enough, elections are decided by voters weighing the issues and making up their minds based on the candidates' positions.

Ryan Sager at Tech Central Station.

We at WUTT! have asserted the latter point for some time. Nice to be proved right in a big race that counts.



Though it certainly helps, money can't buy an election. It's necessary but not sufficient.

Addition to Wish List

One more thing I want to add to my Beggars-Would-Ride wishlist, of things that are achievable but not available for immediate purchase:



I want somebody to offer to recycle old, intermittent, half-lighting strings of Christmas lights. There's too much valuable copper in there for this sh1t to just get shlepped off to a landfill. We're about to ditch a few hundred feet of them because half of the light and they are virtually immune to troubleshooting.



The bulbs can be ground and melted into glass cullet to fill out concrete park benches. The plastic, well, it's probably as valuable as the copper, kilo for kilo, and it could make nice Tyvek envelopes for FedEx someday if it were recovered. The problem, as usual, is identifying what kind of plastic it is so it can be recycled effectively, even if in some cases recycling translates into removal of halogens prior to conversion to Number 2 Diesel fuel.



Here's your bumper sticker:


My Huge SUV burns otherwise-unusable recycled plastics

My new email signature block will read:

"This email message is certified free of slogans, quotes, special backgrounds, special stationeries, digital images, and unusual fonts, in accordance with Air Force Instruction 33-119, Air Force Messaging."

Somebody in the headshed must have objected when he saw a subordinate's email signature was neater-looking than his, and put his Corfam down hard.



Another proud tradition done in just like nose art. Bummer.

A guarantee to deploy

I can't leave this a draft forever. Rather than hack at it further, I release it to the wild.



When I enlisted in the Air National Guard in 1981, I was viewing it as a way to avoid the brewing Central Asian mess. President Carter had pulled the US out of the Olympics in protest of the Soviet Union's invasion of Afghanistan. I didn't want to go to war. Stupid long-haired me.



Since joining, I settled myself down and matured real fast, and reread the contract. I stayed in the Guard because I felt good about what I was doing, to the point that I wanted to deploy so I could prove my worth.



The first invasion of Iraq came and went, and I was not deployed. I completed 20 years of service and received my letter, allowing me to retire. I had time left on my contract, but small children in the house. I seriously contemplated retirement, but I was also unemployed as a civilian, and not dealing well with that fact. The Guard was the only income I had.



When the WTC and the Pentagon were attacked, that desire to deploy became more urgent, and was finally fulfilled. Just days after accepting a new position with a civilian employer, the phone call came---on my cell, as I was headed to Logan Airport from the job site. I was at Cheyenne the following morning, with bags packed.



* * * *



Phil Carter prompts me to post this as I read his post, "Not your Father's National Guard."

My father served in the Army Reserve during the early 1960s as a way to pay for college; it was then, and is now, an honorable way to serve. But you can't compare service then in the Guard with service now, because of the policy changes adopted by the military which made the National Guard an integral part of America's warfighting force.

The Total Force policy was fully in place when I enlisted. The unit that recruited me was a small truck-mobile radar unit that was Checkered-Flagged to Germany, later to Turkey. After Desert Storm, the whole concept of designating a deployment location in advance was scrapped and the Air Expeditionary Force concept took its place. I can be sent anywhere, and am more likely to go as a unit-type code---small teams to perform specific functions, such as fire-fighting, earthmoving, or in my case NBC defense. I'd deploy only with the swinging d1cks to my immediate left and right, as a team, flight or squadron, not as an entire wing.



Parted out like a junked car. One of the Air Guard's strengths, in my opinion, is that we have less churn, less turnover of personnel than our active duty counterparts. We know each other better, have trained together longer, and have turned that to our advantage. AEFs undermined that advantage by splitting us up and mixing us with other forces whose level of training is different. My criticism of AEF has softened somewhat, now that I've gone through it, because it achieves what it sought to do, to even the deployment burden across a career field.

On the Army side, the "parting out" is not as feasible. This means that entire units, built and equipped for a specific Army function such as air-defense artillery, would be repurposed for another function that was needed downrange more urgently, such as military police. I'm glad I didn't have to go through that.



But the AEF concept did make it more likely to deploy if one had a specialty that was needed down range, or that was in short supply in the first place. The more urgent the need, the more likely and frequent the deployment. The tradeoff is shorter and more fixed deployment durations: 90 days, now grown to 120, with a "hard" wall of 179 days at station at any one time without SECAF waiver. In contrast, Army rotations, Guard or active, start at 180 days.



I nearly ended up going to Afghanistan anyway, though 20 years later. I was within a few hundred km of it. And I will almost certainly deploy again.