CPC H05H 9/04 (2013.01) [H01J 37/3171 (2013.01); H05H 7/02 (2013.01); H05H 7/22 (2013.01); H01J 2237/04732 (2013.01); H05H 2007/222 (2013.01); H05H 2007/227 (2013.01)] | 16 Claims |
1. An apparatus, comprising:
a drift tube assembly, the drift tube assembly comprising a plurality of drift tubes that define a triple gap configuration, and are arranged to accelerate and transmit an ion beam along a beam path;
a resonator, to output an RF signal to the drift tube assembly; and
an RF quadrupole triplet, connected to the drift tube assembly, and arranged circumferentially around the beam path, the RF quadrupole triplet comprising:
a first quadrupole formed on a downstream portion of a first grounded drift tube and an upstream portion of a first powered drift tube;
a second quadrupole formed on a downstream portion of the first powered drift tube and an upstream portion of a second powered drift tube; and
a third quadrupole formed on a downstream portion of the second powered drift tube and an upstream portion of a second grounded drift tube,
wherein a downstream surface of the first grounded drift tube forms a complementary match to an upstream surface of the first powered drift tube, wherein a downstream surface of the first powered drift tube forms a complementary match to an upstream surface of the second powered drift tube, and wherein a downstream surface of the second powered drift tube forms a complementary match to an upstream surface of the second grounded drift tube.
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