Penning Traps, Masses and Antiprotons

Gabrielse, Gerald

doi:10.1007/978-1-4684-5389-8_5

Cited by 18 publications

(8 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cold antihydrogen atoms (at temperatures not far from absolute zero ) have not yet been observed, but offer the exciting prospect of antihydrogen captured in a magnetic trap [3] long enough to use lasers to probe for any difference between antihydrogen and hydrogen. The ingredients of cold antihydrogen have been previously confined in the same trap structure [4].…”

mentioning

confidence: 99%

First positron cooling of antiprotons

et al. 2001

View full text Add to dashboard Cite

Positrons are used to cool antiprotons for the first time. The oppositely charged positrons and antiprotons are first simultaneously accumulated in separate Penning trap volumes, and then are spatially merged in a nested Penning trap. The antiprotons cool until they reach a low relative velocity with respect to the cold positrons, the situation expected to be optimal for the production of cold antihydrogen.

show abstract

mentioning

confidence: 99%

First positron cooling of antiprotons

et al. 2001

View full text Add to dashboard Cite

show abstract

“…Many years before CERN built the AD for H experiments, well before any of the H collaborations had been formed, the PI proposed using cold p to form H cold enough to be trapped for precision spectroscopy [22]. A nested Penning trap was proposed to hold p and e + so they would interact [23].…”

Section: Popular Enthusiasmmentioning

confidence: 99%

“…A nested Penning trap was proposed to hold p and e + so they would interact [23]. The H that formed would then be caught in a superimposed Ioffe trap [22].…”

Section: Popular Enthusiasmmentioning

confidence: 99%

“…They reported a much smaller number of ground state H atoms simultaneously trapped for comparable times (0.7 ± 0.5) [?]. None of the ALPHA reports or talks mention that producing and trapping cold H was suggested [22] and popularized long ago as part of our AFOSR-supported research program, long before any collaboration members were involved in p or H physics. Averaging over many trials, ALPHA showed that less H atoms were trapped when a somewhat However, it now seems possible to use adiabtic passage to detect the spin state in every detection attempt to decrease the measurement time.…”

Section: Atrap and Alpha Choose Different Pathsmentioning

confidence: 99%

See 1 more Smart Citation

The Production and Study of Cold Antiprotons and Antihydrogen

Gabrielse¹

2015

View full text Add to dashboard Cite

“…Fourteen years ago, shortly after our TRAP team captured the first cold p, I hesitated before putting into print the futuristic goal of using these to form H that was cold enough to confine in a magnetic trap for precise laser spectroscopy [1]. In the intervening years, however, our TRAP Collaboration developed the techniques to slow, capture, cool and stack suitable cold p at 4 K [2,3], an energy more than 10 10 times lower than any other source.…”

Section: Introductionmentioning

confidence: 99%

Observations of Cold Antihydrogen

Gabrielse¹

2003

The Expanding Frontier of Atomic Physics

View full text Add to dashboard Cite

ATRAP's e+ cooling of p in a nested Penning trap has led to reports of cold H produced during such cooling by the ATHENA and ATRAP collaborations. ATHENA uses coincident annihilation detection and ATRAP uses field ionization followed by p storage. Advantages of the later method include the complete absence of a substantial background of false events intrinsic to the former, and the first way to measure which H states are produced. ATRAP enhances the H production rate by driving many cycles of e + cooling in the nested trap, with more H counted in an hour than the sum of all the other antimatter atoms ever reported. The number of H counted per incident high energy p is also higher than ever observed. The first measured distribution of H states is made using a pre-ionizing electric field between separated production and detection regions. The high rate and the high Rydberg states suggest that the H is formed via three-body recombination, as expected.

show abstract

Penning Traps, Masses and Antiprotons

Cited by 18 publications

References 30 publications

First positron cooling of antiprotons

First positron cooling of antiprotons

The Production and Study of Cold Antiprotons and Antihydrogen

Observations of Cold Antihydrogen

Contact Info

Product

Resources

About