Determination of the proton mass from a measurement of the cyclotron frequencies of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mtext>D</mml:mtext><mml:mo>+</mml:mo></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mtext>H</mml:mtext><mml:mn>2</mml:mn><mml:none /><mml:none /><mml:mo>+</mml:mo></mml:mmultiscripts></mml:mrow></mml:math>in a Penning trap

Solders, Andreas; Bergström, I.; Nagy, Szilárd; Suhonen, Markus; Schuch, R.

doi:10.1103/physreva.78.012514

Cited by 25 publications

(29 citation statements)

References 19 publications

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“…A better control of the number of ions in the trap in the 204 Hg measurement would have allowed a number dependence correction like the one used in [4]. This would have reduced the ion-number-dependent uncertainty to less than 0.1 ppb.…”

Section: (B) Precision Trapmentioning

confidence: 98%

“…With the former spectrometer SMILETRAP I [3] at the Manne-Siegbahn Laboratory (MSL) uncertainties in the mass measurements below 1 ppb (10 −9 ) were routinely reached. The highest achieved relative precision of 0.18 ppb [4] constituted the limit of the setup due to various contraints set by, for example, magnetic field fluctuations and limited measurement times. With the shut-down of the ion source CRYSIS at MSL a new source for HCIs, the Stockholm Electron Beam Ion Trap (S-EBIT), was established at the AlbaNova Research Center and the opportunity was taken to set up a new, improved spectrometer, SMILETRAP II, at the S-EBIT laboratory.…”

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confidence: 99%

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Smiletrap ii

et al. 2011

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The new Penning trap mass spectrometer SMILETRAP II has been set up at the AlbaNova Research Center, Stockholm. Based on the former spectrometer SMILETRAP I, it uses the merits of highly-charged ions to achieve high precision in the mass measurements. Various improvements over the SMILETRAP I setup will allow to routinely perform mass measurements with relative uncertainties of 10 −10 and below. In this paper we will discuss the limitations of SMILETRAP I and present the corresponding improvements of SMILETRAP II. An overview on the SMILETRAP II setup is given.

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Section: (B) Precision Trapmentioning

confidence: 98%

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confidence: 99%

Smiletrap ii

et al. 2011

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“…The proton mass has been determined in several Penning trap experiments [109,110,111] with 140 ppt as best single measurement uncertainty. Combining the measurements, the CODATA group has evaluated the proton mass with 89 ppt uncertainty [105].…”

Section: High-precision Mass Measurementsmentioning

confidence: 99%

BASE – The Baryon Antibaryon Symmetry Experiment

Smorra

Blaum

Bojtár

et al. 2015

Eur. Phys. J. Spec. Top.

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Abstract. The Baryon Antibaryon Symmetry Experiment (BASE) aims at performing a stringent test of the combined charge parity and time reversal (CPT) symmetry by comparing the magnetic moments of the proton and the antiproton with high precision. Using single particles in a Penning trap, the proton/antiproton g-factors, i.e. the magnetic moment in units of the nuclear magneton, are determined by measuring the respective ratio of the spin-precession frequency to the cyclotron frequency. The spin precession frequency is measured by non-destructive detection of spin quantum transitions using the continuous Stern-Gerlach effect, and the cyclotron frequency is determined from the particle's motional eigenfrequencies in the Penning trap using the invariance theorem. By application of the double Penningtrap method we expect that in our measurements a fractional precision of δg/g 10

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“…The 2010 Committee on Data for Science and Technology (CODATA) recommended value of m p /m e has an accuracy of 0.41 ppb. The value of m p /m e is largely determined by two separate mass determinations, namely that of the proton relative mass (in atomic mass units [6,7]) and the electron relative mass [8]. The resulting 0.41 ppb uncertainty stems primarily from the determination of the electron relative mass.…”

Section: Introductionmentioning

confidence: 99%

Observation of the v′=8←v=0 vibrational overtone in cold trapped HD+

et al. 2012

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We report the observation of the hitherto undetected v = 8 ← v = 0 vibrational overtone in trapped HD + molecular ions, sympathetically cooled by laser-cooled Be + ions. The overtone is excited using 782 nm laser radiation, after which HD + ions in v = 8 are photodissociated by the 313 nm laser used for Be + cooling. The concomitant loss of HD + is detected by the method of secular excitation (Roth et al. in Phys. Rev. A. 74:040501(R), 2006). We furthermore present details of the experimental setup, and we show that results from spectroscopy of v = 8 ← v = 0 overtones in combination with accurate ab initio calculations may yield a new value for the proton-electron mass ratio with an accuracy of order 1 ppb.

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Determination of the proton mass from a measurement of the cyclotron frequencies ofD+andH2+in a Penning trap

Cited by 25 publications

References 19 publications

Smiletrap ii

Smiletrap ii

BASE – The Baryon Antibaryon Symmetry Experiment

Observation of the v′=8←v=0 vibrational overtone in cold trapped HD+

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