2009 AIP Industrial Physics Forum: Joseph Lykken of Fermi National Accelerator Laboratory describes the many ways in which particle accelerators are used today, and what we will expect the next generation of accelerators to do.
The future of particle accelerators
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I ran some calculation for a hypothetical Tau particle accelerator as follows:
I had to assume an extremely high as yet unobtainable potential gradient of 300,000,000 GeV/km or 300,000 TeV/km. However, perhaps with novel types of accelerators perhaps including accelerators that use modulated visible light or higher frequency laser light to drive the particles, such accelerators can be built.
For E = 1 TeV, I calculated tau = [(MoC)/(qe)] ln [(2E)/[(Mo)[C EXP 2]]] = {{(1.77684 GeV)/[[ (3 x 10 EXP 5) km/second] EXP 2]}[( 3 x 10 EXP 5) km/second]/[(300,000,000 GeV/km)]} ln {[ 2,000 GeV]/[1.77684 GeV]} = (1.974267 x 10 EXP -14) ln {[ 2,000 GeV]/[1.77684 GeV]} = 1.387132 x 10 EXP – 13.
Now the half life of the Tauon = 2.9 x 10 EXP – 13 seconds.
Therefor the percentage of Tauons surviving was calculated as 2 EXP {-[1.387132 x 10 EXP – 13]/[ 2.9 x 10 EXP – 13]} = 71.78 %
The required Linac length would be 1 TeV/[300,000 TeV/km] = 0.0033 meters
Next I ran the calculations for E = 10 TeV or 20,000 GeV.
For tau, the math is as follows.
tau = [(MoC)/(qe)] ln [(2E)/[(Mo)[C EXP 2]]] = {{(1.77684 GeV)/[[ (3 x 10 EXP 5) km/second] EXP 2]}[( 3 x 10 EXP 5) km/second]/[(300,000,000 GeV/km)]} ln {[ 20,000 GeV]/[1.77684 GeV]} = (1.974267 x 10 EXP -14) ln {[ 20,000 GeV]/[1.77684 GeV]} = 1.84172 x 10 EXP – 13.
The surviving percentage of Tauons is 2 EXP {-[1.84172 x 10 EXP – 13]/[ 2.9 x 10 EXP – 13]} = 64.39 percent. The length of the linac would be 10 TeV/ [300,000 TeV/km] = 0.033 meters.
Next, I ran the calculations for 100 TeV or 100,000 GeV Tauons also with a gradient of electrical potential of 300,000 TeV/km.
For tau, the math is as follows.
tau = [(MoC)/(qe)] ln [(2E)/[(Mo)[C EXP 2]]] = {{(1.77684 GeV)/[[ (3 x 10 EXP 5) km/second] EXP 2]}[( 3 x 10 EXP 5) km/second]/[(300,000,000 GeV/km)]} ln {[ 200,000 GeV]/[1.77684 GeV]} = (1.974267 x 10 EXP -14) ln {[ 200,000 GeV]/[1.77684 GeV]} = 2.2963 x 10 EXP – 13 seconds.
The surviving percentage of Tauons is 2 EXP {-[2.2963 x 10 EXP – 13]/[ 2.9 x 10 EXP – 13]} = 57.76 percent. The length of the linac would be 100 TeV/ [300,000 TeV/km] = 0.333 meters.
Next, I ran the calculations for 1,000 TeV or 1,000,000 GeV Tauons also with a gradient of electrical potential of 300,000 TeV/km.
For tau, the math is as follows.
tau = [(MoC)/(qe)] ln [(2E)/[(Mo)[C EXP 2]]] = {{(1.77684 GeV)/[[ (3 x 10 EXP 5) km/second] EXP 2]}[( 3 x 10 EXP 5) km/second]/[(300,000,000 GeV/km)]} ln {[ 2,000,000 GeV]/[1.77684 GeV]} = (1.974267 x 10 EXP -14) ln {[ 200,000 GeV]/[1.77684 GeV]} = 2.7509 x 10 EXP – 13 seconds.
The surviving percentage of Tauons is 2 EXP {-[2.7509 x 10 EXP – 13]/[ 2.9 x 10 EXP – 13]} = 51.81 percent. The length of the linac would be 1,000 TeV/ [300,000 TeV/km] = 3.333 meters.
I went further still and ran the calculations for 1,000,000 TeV Tauons also with a gradient of electrical potential of 300,000 TeV/km.
For tau, the math is as follows.
tau = [(MoC)/(qe)] ln [(2E)/[(Mo)[C EXP 2]]] = {{(1.77684 GeV)/[[ (3 x 10 EXP 5) km/second] EXP 2]}[( 3 x 10 EXP 5) km/second]/[(300,000,000 GeV/km)]} ln {[ 2,000,000,000 GeV]/[1.77684 GeV]} = (1.974267 x 10 EXP -14) ln {[ 2,000,000,000 GeV]/[1.77684 GeV]} = 4.11469 x 10 EXP – 13 seconds.
The surviving percentage of Tauons is 2 EXP {-[4.11469 x 10 EXP – 13]/[ 2.9 x 10 EXP – 13]} = 37.4 percent. The length of the linac would be 1,000,000 TeV/ [300,000 TeV/km] = 3,333 meters or 3.3 km.
Obviously, a way to create sufficient quantities of Tauons in a small region simultaneously, the ability to collate them, to accelerate them quickly to the point were relativistic time dilation would effectively greatly increase their lifetimes, and a way to filter out noise from random tauon decays within or near the vicinity of the systems detectors would need to be worked out.
Note that I ran similar calculations for a whole host of electrically charged mesons and baryons, such as are comprised of strange quarks, charmed quarks and/or bottom quarks, and derived similar results. In short I have run the numbers and scenarios for about a few dozen such particle species for particles with non-relativistic mean half lives of any where from about 10 EXP - 8 seconds to as small as about 10 EXP - 14 seconds.
I can provide the numbers in these later scenarios, some of which can in theory be realized with significantly smaller acceleration potential than the case of the Tauons given above.