Unitary Penning traps

We have constructed Penning traps in extremely compact forms, with unitary architectures that fully integrate NdFeB magnets (1.2 Tesla remnant magnetic field) within the electrode structure (occupying $< 150$ cm$^3$ assembled). A room-temperature apparatus has proven to be very useful in slowing and capturing ions extracted from an electron beam ion trap (EBIT).\footnote{J. N. Tan, S. M. Brewer, and N. D. Guise, to appear in \textit{Review of Scientific Instruments}} Here we present a two-magnet Penning trap designed to facilitate ion manipulation and optical experiments with stored ions. Some test results are presented. Experiments using this novel system are discussed in two presentations at this meeting.\footnote{N.D. Guise, \textit{et al.}, ``Charge exchange and spectroscopy with isolated highly-charged ions,'' at this meeting.}$^,$\footnote{S. M. Brewer, \textit{et al.}, ``Observing forbidden radiative decay of highly-charged ions in a compact Penning trap,'' at this meeting.} Unitary architecture can be particularly advantageous in small-instrument development (\textit{e.g.}, mass spectrometers) and in facilities or missions that have severe space constraints.