Cryopumping of hydrogen on stainless steel in the temperature range between 7 and 18 K

Chill, Frederic; Wilfert, Stefan; Bozyk, Lars

doi:10.1116/1.5086164

Cited by 3 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This ratio depends only on the surface temperature and the surface coverage. This relationship is described by an adsorption At Θ ≈ 1 the given pressure rises up to its temperature dependent saturation vapour pressure [199].…”

Section: Isothermsmentioning

confidence: 99%

“…For PUMA, we consider the H 2 isotherm data points measured at 4.2 K by Wallén [211] for Cu plated stainless steel and extrapolate the values to lower pressures. Data have been measured to [199], ©2019 American Vacuum Society 10 −11 mbar and do not cover our XHV region of interest. To calculate the pressure P depending on the surface coverage S for the extrapolation, Eq.…”

Section: Isothermsmentioning

confidence: 99%

“…We used data measured by Chill, Wilfert and Bozyk at GSI [199] to extrapolate the isotherm to our region of interest. They measured H 2 adsorption isotherms in a temperature range between 7 K and 18 K. Their data (straight curves) are pictured in Fig.…”

Section: Isothermsmentioning

confidence: 99%

“…The high quality of the data allows to extrapolate an isotherm to 4.2 K. A vapour pressure of P 0 = 4.25×10 −7 mbar for H 2 was used [212], as well as an effective monolayer surface density S m = 6.45 × 10 14 cm −2 and D = 1.29×10 41 J −2 (corresponding to B = 3075 eV −2 ) from Ref. [199].…”

Section: Isothermsmentioning

confidence: 99%

mentioning

confidence: 99%

See 4 more Smart Citations

PUMA, antiProton unstable matter annihilation

Obertelli¹

2022

Eur. Phys. J. A

View full text Add to dashboard Cite

PUMA, antiProton Unstable Matter Annihilation, is a nuclear-physics experiment at CERN aiming at probing the surface properties of stable and rare isotopes by use of low-energy antiprotons. Low-energy antiprotons offer a very unique sensitivity to the neutron and proton densities at the annihilation site, i.e. in the tail of the nuclear density. Today, no facility provides a collider of low-energy radioactive ions and low-energy antiprotons: while not being a collider experiment, PUMA aims at transporting one billion antiprotons from ELENA, the Extra-Low-ENergy Antiproton ring, to ISOLDE, the rare-isotope beam facility of CERN. PUMA will enable the capture of low-energy antiprotons by short-lived nuclei and the measurement of the emitted radiations. In this way, PUMA will give access to the so-far largely unexplored isospin composition of the nuclear-radial-density tail of radioactive nuclei. The motivations, concept and current status of the PUMA experiment are presented.

show abstract

Section: Isothermsmentioning

confidence: 99%

Section: Isothermsmentioning

confidence: 99%

Section: Isothermsmentioning

confidence: 99%

Section: Isothermsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations