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Review of Scientific Instruments | 2016

The cryogenic storage ring CSR

R. von Hahn; Arno Becker; Felix A. Berg; Klaus Blaum; Christian Breitenfeldt; H. Fadil; Florian Fellenberger; M. Froese; S. George; Jürgen Göck; M. Grieser; Florian Grussie; Elisabeth Anna Guerin; O. Heber; Philipp Herwig; Jonas Karthein; Claude Krantz; Holger Kreckel; M. Lange; Felix Laux; Svenja Lohmann; Sebastian Menk; Christian Meyer; Priyadarsini Mishra; O Novotný; A. P. O’Connor; D. A. Orlov; M. L. Rappaport; R. Repnow; Sunny Saurabh

An electrostatic cryogenic storage ring, CSR, for beams of anions and cations with up to 300 keV kinetic energy per unit charge has been designed, constructed, and put into operation. With a circumference of 35 m, the ion-beam vacuum chambers and all beam optics are in a cryostat and cooled by a closed-cycle liquid helium system. At temperatures as low as (5.5 ± 1) K inside the ring, storage time constants of several minutes up to almost an hour were observed for atomic and molecular, anion and cation beams at an energy of 60 keV. The ion-beam intensity, energy-dependent closed-orbit shifts (dispersion), and the focusing properties of the machine were studied by a system of capacitive pickups. The Schottky-noise spectrum of the stored ions revealed a broadening of the momentum distribution on a time scale of 1000 s. Photodetachment of stored anions was used in the beam lifetime measurements. The detachment rate by anion collisions with residual-gas molecules was found to be extremely low. A residual-gas density below 140 cm(-3) is derived, equivalent to a room-temperature pressure below 10(-14) mbar. Fast atomic, molecular, and cluster ion beams stored for long periods of time in a cryogenic environment will allow experiments on collision- and radiation-induced fragmentation processes of ions in known internal quantum states with merged and crossed photon and particle beams.


XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12 | 2015

Laser-induced delayed electron emission of Co−4 anions

S. George; Klaus Blaum; Christian Breitenfeldt; Jürgen Göck; Jonas Karthein; Thomas Kolling; Christian Meyer; Jennifer Mohrbach; Gereon Niedner-Schatteburg; D. Schwalm; Lutz Schweikhard; A. Wolf

The cryogenic trap for fast ion beams (CTF) located at the Max-Planck-Institut fur Kernphysik has been used to study laser-induced delayed electron emission of various molecular and metal-cluster anions. We will discuss recent experiments investigating the radiative cooling respectively heating of Co−4 anions produced in hot and cold ion sources. The experiments will be continued at the cryogenic storage ring (CSR), which is presently being commissioned, to disentangle laser-induced electron emission from atom or cluster dissociation.


XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12 | 2015

The cryogenic storage ring CSR for collision experiments with state-controlled and phase-space cooled molecular ion beams

Arno Becker; Klaus Blaum; Christian Breitenfeldt; Florian Fellenberger; S. George; Jürgen Göck; M. Grieser; Florian Grussie; R. von Hahn; Philipp Herwig; Jonas Karthein; Claude Krantz; Holger Kreckel; Sunil Kumar; M. Lange; Svenja Lohmann; Christian Meyer; Priyadarsini Mishra; O Novotný; Aodh O'Connor; R. Repnow; S. Schippers; C. D. Schröter; Kaija Spruck; D. Schwalm; L Schweikard; Xavier Urbain; Stephen Vogel; A. Wolf

The cryogenic storage ring (CSR) for positive and negative atomic, molecular and cluster ions is starting operation at the Max Planck Institute for Nuclear Physics in Heidelberg.


XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12 | 2015

Toward laser-induced vibrational emission spectroscopy of C+60

Sunil Kumar; Peter Bizenberger; Klaus Blaum; Christian Breitenfeldt; Jürgen Göck; Ulrich Groezinger; Thomas Henning; Jonas Karthein; Bastian Kern; Christian Meyer; Gaël Rouillé; Dmitry Strelnikov; A. Wolf; S. George; Holger Kreckel

C+60 has been proposed to be responsible for two of the diffuse interstellar bands (DIBs), the absorption features observed in the visible-to-near-infrared spectra of the interstellar medium. However, a confirmation requires laboratory gas-phase spectra, which are so far not available. We plan to develop a novel spectroscopy technique that will allow us to obtain the first gas-phase spectra of C+60, and that will be applicable to other complex organic molecules such as polycyclic aromatic hydrocarbons. The current status of the experimental setup, the ideas behind the measurement scheme and the preparatory work toward its implementation will be presented.


XXIX INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC, AND ATOMIC COLLISIONS (ICPEAC2015), PTS 1-12 | 2015

An ion source platform of the cryogenic storage ring (CSR)

P M Mishra; Klaus Blaum; Christian Breitenfeldt; S. George; Jürgen Göck; M Grieser; R. von Hahn; Jonas Karthein; Thomas Kolling; C Krantz; H Kreckel; S Kumar; Jennifer Mohrbach; Gereon Niedner-Schatteburg; Christian Meyer; R Repnow; L Schweikard; A. Wolf

A network of ion sources is being developed on the 300-kV acceleration platform of the cryogenic storage ring (CSR) at the Max-Planck-Institut fur Kernphysik. It consists of several types of sources like a metal ion sputtering source (MISS), a Penning source, a laser vaporization (LVAP) source, and an electrospray ionization (ESI) source to produce a large variety of ions which can be studied for photon and electron interaction in a ro-vibrationally cold environment. Furthermore a storage device such as a radiofrequency quadrupole (RFQ) is foreseen for internal state cooling and accumulation of rarely produced species.


International Journal of Mass Spectrometry | 2014

Upgrades at ClusterTrap and latest results

Franklin Martinez; Steffi Bandelow; Christian Breitenfeldt; Gerrit Marx; L. Schweikhard; Albert Vass; F. Wienholtz


European Physical Journal D | 2013

Appearance size of poly-anionic aluminum clusters, Alnz-, z = 2–5

Franklin Martinez; Steffi Bandelow; Christian Breitenfeldt; Gerrit Marx; L. Schweikhard; F. Wienholtz; Falk Ziegler


Physical Review Letters | 2016

Photodissociation of an internally cold beam of CH+ ions in a cryogenic storage ring

Aodh O'Connor; Arno Becker; Klaus Blaum; Christian Breitenfeldt; S. George; Jürgen Göck; M. Grieser; Florian Grussie; Elisabeth Anna Guerin; Robert von Hahn; U. Hechtfischer; Philipp Herwig; Jonas Karthein; Claude Krantz; Holger Kreckel; Svenja Lohmann; Christian Meyer; Preeti Manjari Mishra; C. Novotny; R. Repnow; Sunny Saurabh; D. Schwalm; Kaija Spruck; Sunil Kumar; Stephen Vogel; A. Wolf


International Journal of Mass Spectrometry | 2012

Lifting of the trapping potential during ion storage for multi-anion production in a Penning trap

Franklin Martinez; Steffi Bandelow; Christian Breitenfeldt; Gerrit Marx; L. Schweikhard; F. Wienholtz; Falk Ziegler


Physical Review A | 2016

Decay processes and radiative cooling of small anionic copper clusters

Christian Breitenfeldt; Klaus Blaum; M. Froese; S. George; Gregorio Guzmán-Ramírez; M. Lange; Sebastian Menk; L. Schweikhard; A. Wolf

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