Conveners
Polarized Ion and Lepton Sources and Targets
- Kurt Aulenbacher (Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
- Christopher Keith (Jefferson Lab)
Polarized Ion and Lepton Sources and Targets
- Kurt Aulenbacher (Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
- Christopher Keith (Jefferson Lab)
Polarized Ion and Lepton Sources and Targets
- Kurt Aulenbacher (Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
- Christopher Keith (Jefferson Lab)
Polarized Ion and Lepton Sources and Targets
- Christopher Keith (Jefferson Lab)
- Kurt Aulenbacher (Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
Dr
Kurt Aulenbacher
(Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
10/09/2018, 14:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Several extensions are being realized for the new MESA accelerator at Mainz university in comparison to the already existing injection system at MAMI. The new device is operating at 100keV beam energy and is called the Mesa Low-energy Beam Apparatus (MELBA). A new polarized source of the inverted type with increased extraction gradient has been build which is able to provide good beam quality...
Dr
Gerhard Reicherz
(Ruhr University Bochum, Germany)
10/09/2018, 14:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The COMPASS collaboration performed a polarized Drell-Yan program to measure TMD (Transverse Momentum Dependent) and PDFs (Parton Distribution Functions) in 2015. To improve the statistics the program is continued for this year 2018. In the Drell-Yan program a negative pion beam of 190 GeV/c with an intensity of 108 /s is scattered on a transversely polarized proton target with a length of...
Erhard Steffens
(Physics Dept., FAU Erlangen-Nürnberg)
10/09/2018, 15:10
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Since 2017, the LHCSpin study group (Ferara, Frascati, Jülich, Petersburg, Erlangen) is investigating the addition of a HERMES-type PGT in front of the LHCb detector in order to perform Fixed Target Single-Spin Azimuthal Asymmetry (SSAA) measurements. In cooperation with LHC experts, the conditions for applying a PGT are being studied. A cold openable storage cell is considered. A key role for...
Dr
Ralf Engels
(Institut für Kernphysik, Forschungszentrum Jülich)
10/09/2018, 15:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
An atomic beam source (ABS) is producing a nuclear- and electron-polarized beam of hydrogen or deuterium atoms that can be used to feed a polarized storage-cell gas target. In a dedicated apparatus these atoms recombine on the surfaces inside the storage cells to molecules. Depending on the chosen surface material, the nuclear polarization of the atoms is at least partially preserved in the...
Dr
Anatoli Zelenski
(BNL)
10/09/2018, 15:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The RHIC Optically-pumped Polarized H- Ion Source (OPPIS) upgrade with the atomic beam hydrogen injector and the He-ionizer cell was commissioned for operation in the Run-2013. The use of the high brightness primary proton source resulted in higher polarized beam intensity and polarization delivered for injection to Linac-Booster-AGS-RHIC accelerator complex in RHIC Runs 2013-2017. The...
Mr
James Brock
(Jefferson Lab)
10/09/2018, 16:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Construction of a new, dynamically polarized target for the recently commissioned CLAS12 detector package at Jefferson Lab presents new challenges. The target, currently under construction by a collaboration comprised of Christopher Newport University, Old Dominion University, the University of Virginia, and the Jefferson Lab Target Group, will feature samples of solid, irradiated ammonia...
Dr
James Maxwell
(Dr.)
10/09/2018, 17:00
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Solid polarized targets rely on Nuclear Magnetic Resonance techniques to provide measurements of the enhanced polarization provided under Dynamic Nuclear Polarization. Upcoming polarized target experiments in Jefferson Lab's Hall B present challenging conditions which would benefit from improvements to traditional NMR techniques. For decades, JLab has relied upon Liverpool QMeters for NMR...
Joshua Pierce
(Oak Ridge National Laboratory)
10/09/2018, 17:20
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Neutron Macromolecular Crystallography is a powerful technique for the determination of the structure of proteins. The sensitivity of the neutron scattering cross section to the presence of hydrogen gives this technique a unique advantage compared to the more widely used X-ray crystallography. The problem with neutron crystallography is the low flux of even the most advanced neutron sources...
Dr
Evgeni Tsentalovich
(MIT)
10/09/2018, 17:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The high intensity polarized electron gun at MIT-Bates was designed as an injector for the linac-ring version of ERHIC.. The design implements a separate preparation chamber, load lock, large area cathode, ring-shaped beam and active cathode cooling. Very good vacuum conditions have been achieved in both the gun chamber and the preparation chamber. Reliable cathode transfer between the load...
Mr
Lukas Huxold
(HHU Duesseldorf)
10/09/2018, 18:00
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Usually, Lambshift polarimeters are used to measure the nuclear spin polarisation of hydrogen atomic beams or slow proton beams of about 1keV. As recent experiments aim to produce polarised hydrogen molecules (H2 HD, D2), either by recombining atoms (IKP @FZ-Jülich) or with a new molecular-beam-source (BINP), a nuclear spin polarimeter for molecules is needed. As it will be shown in this talk...
Dr
Hartmut Dutz
(Universität Bonn)
11/09/2018, 14:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
In my talk, I will present the actual status of our projects with special focus on the first results of the dynamic polarizability of radiation-doped polypropylene in a dilution refrigerator under frozen spin conditions. Briefly, I will present new ideas and concepts for high field internal magnets for polarized target applications.
Mr
Marcel Bornstein
(Physikalisches Institut Universität Bonn)
11/09/2018, 14:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The new concept of the ``4$\pi$-Continuous-Mode-Target'' will allow for the first time the simultaneous usage of a large angular acceptance detector with a continuously polarised target. For polarising a target the process of Dynamic Nuclear Polarisation (DNP) is used which requires low temperatures and a high homogeneous magnetic field within the target volume. A thin, superconducting magnet...
Dr
Stefan Runkel
(polarized Target, University of Bonn)
11/09/2018, 15:10
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
In 2017, the polarized target system from Mainz/Dubna and Bonn were combined for data taking in Bonn. After testing the combined system, the experiment with the new polarized frozen-spin target and the upgraded Crystal Barrel detector started in winter 2017. First data with a transversal proton target were already taken.
In the meantime, the polarized target group at Bonn is building a...
Dr
Yury Plis
(JINR, Dubna, Russia)
11/09/2018, 15:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The first attempt is made to realize a polarized deuteron source suited for the Van de Graaff accelerator of Czech Technical University in Prague based on the idea of Kaminsky on channeling deuterons through a Nickel single crystal. The setup is described which contains permanent magnets with a transversal magnetic field (zero field transition) to increase the deuteron polarization up to 2/3...
Dr
Dimitris Sofikitis
(IESL-FORTH)
11/09/2018, 15:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Lasers can be used to polarize the valance electrons in an atomic or molecular system [1]. However, if this is done rapidly (< 1ns), it can establish a quantum beating mechanism which transfers polarization to the nuclear spin and ultimately provides the means to control nuclear spin with optical fields. The increasing capabilities (photon flux) of modern commercial lasers and the fact that...
Dr
Andrew Sandorfi
(Jefferson Lab)
11/09/2018, 16:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Solid frozen-spin hydrogen-deuteride targets, have been used successfully with polarized photon beams for nuclear physics measurements over the past decade, first at Brookhaven Lab, and recently at Jefferson Lab [1-4]. With the completion of the 12 GeV upgrade to the Jefferson Lab accelerator, the focus of polarized HD at JLab has shifted to experiments with electron beams. In particular,...
Marco Statera
(MI)
11/09/2018, 17:00
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
An innovative magnetic solution is being pursued for inserting a transversely polarized target inside the central solenoid of the CLAS12 detector at Jefferson Lab, in order to measure transverse spin effect in SIDIS with the 11 GeV upgrade of CEBAF. A feasibility study of a bulk superconducting magnetic system is underway, to provide a transverse holding field for the target while compensating...
dustin keller
(uva)
11/09/2018, 17:20
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The combination of high luminosity and large kinematic coverage makes SeaQuest at Fermilab an optimal facility to measure single spin asymmetries, with high precision, in polarized Drell-Yan scattering. Scattering the unpolarized beam at Fermilab from the UVA/LANL polarized target will allow isolation of the dynamics of sea quarks in the polarized nucleon. This will allow for the first time a...
Dr
Victor Fimushkin
(Joint Institute for Nuclear Research)
11/09/2018, 17:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The high intensity pulsed source of polarized ions (SPI) has been developed at JINR in collaboration with INR RAS for injection of polarized deuterons and protons into the Nuclotron and future collider of heavy and light ions NICA. The SPI is an atomic beam-type polarized ion source with a charge-exchange plasma ionizer and a storage cell in the ionization region. The source was commissioned...
