ProtonsDeuteronsAlpha particlesHelium-3 ions
Maximum energy (Mev)7304609101140
Energy spread (Mev)55
Beam intensity
Average current (μa)0.750.750.25
Peak current (μa)12012040
Beam radius, maximum (in.)82828282
Time required for acceleration (msec)64.54.5
Number of revolutions during acceleration75,00060,00060,000
Distance traveled during acceleration (miles)450360360
Velocity at maximum energy (% of speed of light)82606069
Mass increase at maximum energy (% of rest mass)75252540
Range of full-energy particles (in. of aluminum)37127

External Beams
Physics caveMeson cave
ProtonsNeutronsπ+π+π-
Energy (Mev)730 310100250100300
Energy spread (Mev)14 10201030
Beam area (cm2)25 40100100100100
Flux (particles/cm2-sec)2×10105×1055×104100010015001000

Acceleration chamber (vacuum tank)

Size
length (ft)25
width (ft)20
height (ft)4
Material: mild steel
Operating pressure (mm Hg)10-5
Vacuum pumps: six 20-in. oil-diffusion pumps with 8-in. boosters:
one Beach-Russ 750-cfm; one Kinney 300-cfm; two Kinney 105-cfm.
Pumping speed of oil-diffusion pumps (liters/sec)20,000

Magnet

Core diameter (in.)184
Pole-tip diameter (in.)188.75
Pole gap at center (in.)14
Magnetic field strength (gauss)
at center23,400
at radius of 82.2 in., where n = 0.222,275
Weight of steel (tons)4,000
Magnet coilsMain coilsAuxiliary coils
materialsolid copper
(1/4 × 4 in.)
hollow copper
(1-3/16 × 1-1/16 in.)
weight of copper (tons)30040
number of turns (total)2,600425
ampere turns1.9 × 1061.1 × 106
current (amp)16002800
voltage (v)550560
power (kw)9001600
coolantoilwater