  Solenoid Siberian snakes have successfully maintained polarization in
particle rings below 1 GeV, but never in multi-GeV rings because the Lorentz
contraction of a solenoid's integral B dl would require impractically long
high-field solenoids. High energy rings, such as Brookhaven's 255 GeV
Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of
transverse B-field Siberian snakes directly opposite each other. When it became
impractical to use a pair of Siberian Snakes in Fermilab's 120 GeV Main
Injector, we searched for a new type of single Siberian snake, which should
overcome all depolarizing resonances in the 8.9 - 120 GeV range. We found that
one snake made of one 4-twist helix and 2 short dipoles could maintain the
polarization. This snake design might also be used at other rings, such as
Japan's 30 GeV J-PARC, the 12 - 24 GeV NICA proton-deuteron collider at
JINR-Dubna, and perhaps RHIC's injector, the 25 GeV AGS.
