Refrigerator electron beam ion trap-source

摘要

An ion beam producing device employing a refrigeration system to provide the cooling for a superconducting compression magnet at a trap core of an electron beam ion trap (EBIT) without the use of cryogenic liquid gases. The elimination of cryogenic cooling gases, such as liquid helium, is effectuated by the incorporation of cryo-refrigerators having highly thermally conductive cryo-heads, and a super-conducting, solid lead arrangement for energizing the compression magnet, the leads producing little or no heat within the cold shield. The reduction or elimination of use of liquid cooling-gases significantly reduces the size and operating cost of the electron beam source/trap system. A magnetic field line guide-field reduces magnet field-line interference otherwise risked by the reduction in size of the electron beam device.