Chinese Physics C > 2008, Vol. 32 > Issue(8): 668-672 DOI: 10.1088/1674-1137/32/8/017

Design of magnet and control of the beam emittance for Penning H^－ion source

OUYANG Hua-Fu^,,
ZHANG Hua-Shun

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Abstract：

The design requirement and principle of the deflection magnet for Magnetron and Penning H^－ion source are discussed. It is proved that there exists a maximum emittance for the beam that may be transformed by the magnet into a state with equal Twiss parameters of α_r=α_yand β_r=β_y, which is the requisite condition to get a minimum emittance at the entrance of RFQ after transporting by a LEBT with solenoids. For this maximum emittance, the corresponding magnetic field gradient index is 1.

References

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OUYANG Hua-Fu and ZHANG Hua-Shun. Design of magnet and control of the beam emittance for Penning H ^－ion source[J]. Chinese Physics C, 2008, 32(8): 668-672. doi: 10.1088/1674-1137/32/8/017

OUYANG Hua-Fu and ZHANG Hua-Shun. Design of magnet and control of the beam emittance for Penning H ^－ion source[J]. Chinese Physics C, 2008, 32(8): 668-672. doi:10.1088/1674-1137/32/8/017 shu

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Received: 2007-10-08
Revised: 2007-10-17

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沈阳化工大学材料科学与工程学院沈阳 110142

Design of magnet and control of the beam emittance for Penning H^－ion source

OUYANG Hua-Fu^,
ZHANG Hua-Shun

Corresponding author:OUYANG Hua-Fu,

Received Date:2007-10-08
Accepted Date:2007-10-17
Available Online:2008-08-05

Abstract:

The design requirement and principle of the deflection magnet for Magnetron and Penning H^－ion source are discussed. It is proved that there exists a maximum emittance for the beam that may be transformed by the magnet into a state with equal Twiss parameters of α_r=α_yand β_r=β_y, which is the requisite condition to get a minimum emittance at the entrance of RFQ after transporting by a LEBT with solenoids. For this maximum emittance, the corresponding magnetic field gradient index is 1.