Conveners
Acceleration, Storage and Polarimetry of polarized Beams: Chair: Mitsuhiro Fukuda
- Vahid Ranjbar (BNL)
- Mitsuhiro Fukuda (RCNP, Osaka University)
- Tsutomu Mibe (IPNS/KEK)
Acceleration, Storage and Polarimetry of polarized Beams: Chair: Masanori Wakasugi
- Vahid Ranjbar (BNL)
- Mitsuhiro Fukuda (RCNP, Osaka University)
- Tsutomu Mibe (IPNS/KEK)
Acceleration, Storage and Polarimetry of polarized Beams: Chair: Vahid Ranjbar
- Tsutomu Mibe (IPNS/KEK)
- Mitsuhiro Fukuda (RCNP, Osaka University)
- Vahid Ranjbar (BNL)
Acceleration, Storage and Polarimetry of polarized Beams: Chair: Tsutomu Mibe
- Tsutomu Mibe (IPNS/KEK)
- Mitsuhiro Fukuda (RCNP, Osaka University)
- Vahid Ranjbar (BNL)
In recent years, Laser Plasma Acceleration (LPA) has become a promising alternative to conventional RF accelerators. However, so far, it has only been theoretically shown that polarized LPA beams are possible.
The LEAP (Laser Electron Acceleration with Polarization) project at DESY aims to demonstrate this experimentally for the first time, using a prepolarized plasma target.
The electron...
The matter-antimatter asymmetry may be explained through CP-violation by observing a permanent electric dipole moment (EDM) of subatomic particles. An advanced approach to measure the EDM of charged particles is to apply a unique method of "Frozen spin" on a polarized beam in an accelerator. To increase the experimental precision step by step and to study systematic effects, the EDM experiment...
The matter-antimatter asymmetry might be understood by investigating the EDM (Electric Dipole Moment) of elementary particles. A permanent EDM of a subatomic particle violates time reversal and parity symmetry at the same time and a discovery of a non-zero EDM would be a strong indication for physics beyond the Standard Model.
The JEDI-Collaboration (Jülich Electric Dipole moment...
The Spin Transparency technique is discussed as an efficient, highly flexible method for control of the beam polarization. It applies from acceleration to long term maintenance and spin manipulation in real time during an experimental run of a collider or storage ring. This method relies on "transparent" collider structures where, for a particle moving on the design orbit, any initial...
The JEDI (Jülich Electric Dipole moment Investigations) collaboration in Jülich is conducting a set of experiments at the COSY accelerator and storage ring, aiming to develop experimental techniques to measure the EDMs of charged particles, like proton and deuteron. One of the key elements of these experiments is the modular polarimeter (JEPO) with a special target system.
In the current...
The Jülich Electric Dipole moment Investigations (JEDI) collaboration is performing a measurement of the electric dipole moment (EDM) of charged hadrons in storage rings. To perform this measurement with a high precision, it requires a small systematic error. A large contribution to the systematic error is due to unknown magnetic fields, which are picked up when one is off of the optimal...
The P2-experiment will measure the weak charge of the proton with high precision at the MESA accelerator facility.
Using elastic scattering of longitudinally spin polarized electrons off the proton, the parity-violating asymmetry has to be measured with high accuracy.
New approaches have been chosen to fulfill the increased demands compared to older experiments which to large extent...
The requirements to hadron polarimetry at future Electron Ion Collider (EIC) include measurements of the absolute helion (${}^3\text{He}$, $h$) beam polarization with systematic uncertainties better than $\sigma^\text{syst}_P/P\le1\%$. Here, we consider a possibility to utilize the Polarized Atomic Hydrogen Gas Jet Target (HJET) for precision measurement of polarization of the...
Even though Møller scattering has been a subject of several precise experiments, studies of the final spin state in Møller scattering of polarized electron beams offer a unique tool for testing the fundamnetal predictions of relativistic quantum mechanics. The aim of this work was to measure the polarization transfer in Møller scattering (the ratio of the transverse polarization vector...
We report on the design and performance of a Mott polarimeter optimized for a nominal 5-MeV electron beam from the Continuous Electron Beam Accelerator Facility (CEBAF) injector. The rf time structure of this beam allows the use of time of flight in the scattered electron detection, making it possible to cleanly isolate those detected electrons that originate from the scattering foil, and...
The JEDI experiment is devoted to the search for the electric
dipole moment (EDM) of charged particles in a storage ring, as a very
sensitive probe of physics beyond the Standard Model. In order to reach the highest possible sensitivity, a fundamental parameter to be optimized is the particles' Spin Coherence Time (SCT), i.e., the time interval within which the particles of the stored beam...
A spin distribution in a high energy $e^{+}$ or $e^{-}$ storage ring is governed by a $(6+1)$ dimensional linear Fokker-Planck-type equation known as the full Bloch equation. Its reduction, the reduced Bloch equation (RBE), is the spin-orbit diffusion equation which takes into account just those terms in the spin-orbit dynamics that suffice for calculating the spin-depolarization rate....
A polarized electron beam is being considered as an upgrade for the SuperKEKB accelerator. Having a polarized beam at Belle II opens a new precision electroweak physics program, as well as improving sensitivity to dark sector and lepton flavour violating processes. In order to achieve a polarized beam at SuperKEKB a variety of hardware and technical challenges are being studied. The limiting...
A new particle spin tracking feature has been developed and implemented within General Particle Tracer (GPT). Simulating polarized particles under various conditions within accelerators requires the classical dynamics and time-dependent spin equation of motion. These equations capture the particles behavior as it interacts with electro-magnetic fields. The GPT-Spin extension is able to track...
Our contribution describes design, fabrication and testing of the high voltage system to upgrade the Wien spin rotator to be compatible with the 200 keV electron beam. This required Solidworks modeling, CST and Opera electro- and magnetostatic simulations, upgrading HV vacuum feedthroughs, and assembly techniques for improving electrode alignment. The electric and magnetic fields required by...
