Beam optics issues for the antiproton decelerator

Belochitskii, P.; Carli, C.; Eriksson, Tommy; Giannini, R.; Maury, S.; Möhl, D.; Pedersen, F.

doi:10.1109/pac.1997.750700

Cited by 7 publications

(7 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…conclusion, for the first time the application of the double Penning trap method has been demonstrated with a single proton. This result paves the way towards the first direct high precision measurement of the proton and antiproton magnetic moment in the BASE experiment at the Antiproton Decelerator of CERN [34,35].…”

mentioning

confidence: 68%

Demonstration of the double Penning Trap technique with a single proton

et al. 2013

View full text Add to dashboard Cite

Spin flips of a single proton were driven in a Penning trap with a homogeneous magnetic field. For the spin-state analysis the proton was transported into a second Penning trap with a superimposed magnetic bottle, and the continuous Stern–Gerlach effect was applied. This first demonstration of the double Penning trap technique with a single proton suggests that the antiproton magnetic moment measurement can potentially be improved by three orders of magnitude or more

show abstract

mentioning

confidence: 68%

Demonstration of the double Penning Trap technique with a single proton

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The Antiproton Decelerator (AD) facility of CERN [1,2] began operation in 1999 to carry out highprecision laser spectroscopy of antihydrogen (H) and antiprotonic helium (pHe + ) atoms. It was envisaged that by comparing the characteristic transition frequencies of these atoms with the corresponding ones for hydrogen (H) in the H case, or quantum electrodynamics (QED) calculations in the pHe + case at the highest possible precision, the consistency of CP T invariance could be tested.…”

Section: Introductionmentioning

confidence: 99%

“…The AD was conceived as an economical replacement for the previous Low Energy Antiproton Ring (LEAR) facility of CERN, which was shut down in 1996 [1,2,28]. LEAR carried out pioneering studies on CP violation, meson spectroscopy, and nuclear reactions using high-intensity beams of p circulating inside the storage ring, or extracted as a continuous beam of up to 10 7 s −1 .…”

Section: Introductionmentioning

confidence: 99%

Physics at CERN’s Antiproton Decelerator

Hori

Walz

2013

Progress in Particle and Nuclear Physics

View full text Add to dashboard Cite

The Antiproton Decelerator (AD) facility of CERN began operation in 1999 to serve experiments for studies of CP T invariance by precision laser and microwave spectroscopy of antihydrogen (H) and antiprotonic helium (pHe + ) atoms. The first 12 years of AD operation saw cold H synthesized by overlapping clouds of positrons (e + ) and antiprotons (p) confined in magnetic Penning traps. Cold H was also produced in collisions between Rydberg positronium (P s) atoms and p. Ground-state H was later trapped for up to ∼ 1000 s in a magnetic bottle trap, and microwave transitions excited between its hyperfine levels. In the pHe + atom, deep ultraviolet transitions were measured to a fractional precision of (2.3-5) × 10 −9 by sub-Doppler two-photon laser spectroscopy. From this the antiproton-to-electron mass ratio was determined as M p /m e =1836.1526736(23), which agrees with the p value known to a similar precision. Microwave spectroscopy of pHe + yielded a measurement of the p magnetic moment with a precision of 0.3%. More recently, the magnetic moment of a single p confined in a Penning trap was measured with a higher precision, as µ p = −2.792845(12)µ nucl in nuclear magnetons. Other results reviewed here include the first measurements of the energy loss (−dE/dx) of 1-100 keV p traversing conductor and insulator targets; the cross sections of low-energy (< 10 keV) p ionizing atomic and molecular gas targets; and the cross sections of 5-MeV p annihilating on various target foils via nuclear collisions. The biological effectiveness of p beams destroying cancer cells was measured as a possible method for radiological therapy. New experiments under preparation attempt to measure the gravitational acceleration of H or synthesize H + . Several other future experiments will also be briefly described.

show abstract

“…The reason for that is given by the characteristics of the only low-energy antiproton beam available currently at the Antiproton decelerator (AD) of CERN. The AD [1,2] produces pulses of 3-5×10 7 antiprotons of 5.3 MeV kinetic energy every 90-120 second, which makes the beam only usable to be trapped in Penning traps or stopped in low-density gas targets. Two collaborations working at the AD, ATRAP [3] and ALPHA [4], have as goal to produce antihydrogen, the most simplest atom consisting only of antimatter, from its charged constituents by trapping antiprotons and positrons in Pennning traps, to trap the resulting antihydrogen in a neutral-atom trap and to perform 1S-2S laser spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Precision Physics with Low-energy Antiprotons -from AD to FLAIR

Widmann

2010

Preprint

View full text Add to dashboard Cite

Experiments with low-energy antiprotons are currently performed at the Antiproton Decelerator of CERN. The main experiments deal with the spectroscopy of antiprotonic helium, an exotic three-body system, and the formation and spectroscopy of antihydrogen. A next generation facility FLAIR (Facility for Low-energy Antiproton Rsearch) is planned at the FAIR facility, generating a factor 100 higher flux of stopped antiprotons and also offering continuous antiprotons beam, which will enable nuclear and particle physics type experiments.

show abstract

Beam optics issues for the antiproton decelerator

Cited by 7 publications

References 1 publication

Demonstration of the double Penning Trap technique with a single proton

Demonstration of the double Penning Trap technique with a single proton

Physics at CERN’s Antiproton Decelerator

Precision Physics with Low-energy Antiprotons -from AD to FLAIR

Contact Info

Product

Resources

About