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SLAC T3
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Specifications:
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- 0.5 Hz
- 2 J, 1.5 ps FWHM, 0.7 TW , 1053 nm, circularly polarized
- 1 J, 1.5 ps, 527 nm, 30 mm2 spot or 6 times diffraction limited
- for IR 10^18 W/cm2 or 50 mm2 or 2 times diffraction limited
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- schematic
(from Barnber et al.: 1999, Phys. Rev. D, June 14., see
also more detailed diagram (pdf))
- Laser developed at Rochester's Laboratory for Laser Energetics
team representative Adrian Melissinos (LLE)
- Oscillator diagram showing electron beam synchronization timing system
- Last optical table (see also larger version)
third of 3 tables, slab amplifier (top center, but hard to see), anamorphic optics,
vacuum spatial filters (black tube on left, blue tube on right) and
large compression gratings (aluminum and gold objects just to right of center).
- Target chamber.
Laser beam enters from top left, comes down pipes on right, collides with electron beam in stainless steel box.
Scattered electrons bend downwards, positrons bend upwards in string of magnets with purple ears.
Wolfram Ragg is adjusting ECAL detector. Theo Kotseroglou is in background on left. (see also
larger version
- Diagram of interaction region
(from Ehrenstein, D.: 1997, Science 277, 1202)
Electron beam intersects laser pulse, boosting photons to gamma energies and triggering an
interaction that spawns particles.
- Animation of electron pulse colliding with laser pulse with creation of matter and antimatter.
(from E144 Photo Gallery)
- Cartoon of white-lab-coated fellow transforming light into matter with the aid of a magician's hat.
(from Nov. 1997, Photonics Spectra, p.31)
- Steps in the laser chain (Pessot, M., Maine, P., Mourou, G.: 1987, Opt. Comm. 62, 419.; Strickland,D., Mourou, G. : 1985, Opt. Comm. 55, 447.)
- mode-locked Nd:YLF oscillator synchronized to accelerator (Koffas,T., Melissinos, A.C.: E-144 Internal Note (Apr. 19, 1998))
- Nd:glass regenerative amplifier
- two pass Ng:glass rod
- Nd:glass slab amplifier, 6 kJ flashlamps (Martin, W.S., Chernoch, J.P.: 1972, US Patent 3633126.; Shoup III, M.J., Kelley, J.H.: 1989, CLEO '89, Baltimore, MD.)
- Recircularization required after slabs because of 1 cm X 4 cm elliptical beaM SIZE
- two 1760-lines/mm, gold-coated, 160 X 220 mm holographic gratings
used in the near-Littrow, double-pass configuration
with a separation distance of 164 cm (Martinez, O.E.: 1987, IEEE J. Quan. Elec. QE-23, 59.)
- 4 mm or 8 mm thick Type II KDP doubling crystals, (45 % efficient doubling) (Craxton at al.: 1981, IEEE J. Quan. Elec. QE-17, 1782.)
thicker crystals used at lower intensity (I < 30 GW cm-2)
- Circularly polarized with liquid crystal polarizer
- SLAC-R-529 July 1998,
A Study of High Field Quantum Electrodynamics in the Collision of High Energy Electrons with a Terawatt Laser
- SLAC-PUB-7130
Picosecond Timing of Terawatt Laser Pulses With the SLAC 46 GeV Electron Beam
- Laser proposal, 1992, Nature May 28
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Laser proposal, 1994, Physics Today, July; and CERN Courier, June
- Building with FFTB in mid-foreground (mistake: image is inverted)
(see also larger version)
- wider field of view of building
- Areal view of SLAC
- Directions (Stanford area)
- Directions (campus)
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