Timofey Gorlov
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View article: Photodetachment of negative hydrogen ion beam
Photodetachment of negative hydrogen ion beam Open
The method of H- photoionization is interesting for laser assisted charge exchange injection. In this paper, the model and computation of photoionization of negative hydrogen ion by using strong lasers is considered. The development of thi…
View article: POSSIBLE EXPERIMENTS ON WAVE FUNCTION LOCALIZATION DUE TO COMPTON SCATTERING.
POSSIBLE EXPERIMENTS ON WAVE FUNCTION LOCALIZATION DUE TO COMPTON SCATTERING. Open
The reduction of a particle’s wave function in the process of radiation or light scattering is a longstanding problem. Its solution will give a clue on processes that form, for example, wave functions of electrons constantly emitting synch…
View article: Laser-assisted charge exchange as an atomic yardstick for proton beam energy measurement and phase probe calibration
Laser-assisted charge exchange as an atomic yardstick for proton beam energy measurement and phase probe calibration Open
Laser-assisted charge exchange (LACE) is a novel scheme for injecting H- ions into proton rings. Lorentz stripping of H- ions into bare protons in magnetic dipoles is enabled by laser excitation that reduces the electron binding energy. We…
View article: Open XAL Status Report 2021
Open XAL Status Report 2021 Open
The Open XAL accelerator physics software platform is being developed through international collaboration among several facilities since 2010. The goal of the collaboration is to establish Open XAL as a multi-purpose software platform supp…
View article: Paraxial optics of charged particles in solenoids
Paraxial optics of charged particles in solenoids Open
Paraxial optics of charged particles in solenoid magnets with axisymmetric field is considered. Analytic and symplectic transverse maps for charged particle motion through solenoids with 3D magnetic fields have been derived. The formula fo…
View article: Sequential Excitation Scheme for Laser Stripping of Hydrogen Ion Beams
Sequential Excitation Scheme for Laser Stripping of Hydrogen Ion Beams Open
Resonant laser excitation of the electron in a hydrogen atom is essential to achieve high-efficiency laser stripping of hydrogen ion (H⁻) beam. In the laser stripping experiments recently carried out at SNS, an ultra-violet (UV) laser was …
View article: Injection of a self-consistent beam with linear space charge force into a ring
Injection of a self-consistent beam with linear space charge force into a ring Open
One major concern in the design and operation of high-intensity rings is beam loss due to beam halo. Another issue of importance in applications involving fixed targets is the uniformity of the beam energy deposition on the target. Both of…
View article: Towards Operational Scalability for H⁻ Laser Assisted Charge Exchange
Towards Operational Scalability for H⁻ Laser Assisted Charge Exchange Open
The experimental development of H⁻ laser assisted charge exchange, a.k.a. laser stripping, has been ongoing at the SNS accelerator since 2006 in a three-phase approach. The first two phases associated with proof-of-principle and proof-of-p…
View article: Progress Toward a Self-Consistent Beam at the Spallation Neutron Source
Progress Toward a Self-Consistent Beam at the Spallation Neutron Source Open
We have proposed to inject a self-consistent "rotating" beam into the Spallation Neutron Source (SNS). Self-consistent beam distributions are defined to be ellipsoidal, or elliptical in 2D, distributions that have uniform density and that …
View article: Fringe Field Effect of Solenoids
Fringe Field Effect of Solenoids Open
We derive a precise analytical nonlinear transverse map for single particle transport through a solenoid with hard edge fringe fields. The transfer map is two dimensional for transverse coordinates and momenta with fixed longitudinal momen…
View article: Demonstration of High Efficiency Laser-Assisted H<sup>-</sup> Charge Exchange for Microsecond Duration Beams
Demonstration of High Efficiency Laser-Assisted H<sup>-</sup> Charge Exchange for Microsecond Duration Beams Open
Laser-assisted stripping is a novel approach to H- charge exchange that overcomes longstanding limitations associated with the traditional, foil-based method of producing high intensity, time structured beams of protons. This paper reports…
View article: Injection of a Self-Consistent Beam at the Spallation Neutron Source
Injection of a Self-Consistent Beam at the Spallation Neutron Source Open
We plan to demonstrate the injection of a self-consistent beam into the Spallation Neutron Source (SNS). Self-consistent beams are defined to be ellipsoidal distributions with uniform density and to retain these properties under all linear…
View article: Laser System Design and Operation for SNS H⁻ Beam Laser Stripping
Laser System Design and Operation for SNS H⁻ Beam Laser Stripping Open
Recently, a high-efficiency laser assisted hydrogen ion (H⁻) beam stripping was successfully carried out in the Spallation Neutron Source (SNS) accelerator. The experiment was not only an important step toward foil-less H⁻ stripping for ch…
View article: The SNS Laser Stripping Injection Experiment and its Implications on Beam Accumulation
The SNS Laser Stripping Injection Experiment and its Implications on Beam Accumulation Open
The laser assisted H⁻ charge exchange concept is under development at the Spallation Neutron Source (SNS) as on option for replacing traditional carbon-based foil technology in future accelerators. A laser based stripping system has the po…
View article: Laser Stripping H⁻ Charge Exchange Injection by Femtosecond Lasers
Laser Stripping H⁻ Charge Exchange Injection by Femtosecond Lasers Open
A new method for H⁻ laser assistant charge exchange injection using femtosecond laser pulses is considered. The existing method uses a divergent laser beam that allows compensation of angular and momentum spread of the stripped beam. The f…
View article: The Particle Accelerator Simulation Code PyORBIT
The Particle Accelerator Simulation Code PyORBIT Open
The particle accelerator simulation code PyORBIT is presented. The structure, implementation, history, parallel and simulation capabilities, and future development of the code are discussed. The PyORBIT code is a new implementation and ext…
View article: Preliminary Studies of Laser-assisted H⁻ Stripping at 400 MeV
Preliminary Studies of Laser-assisted H⁻ Stripping at 400 MeV Open
Conventional H⁻ stripping injection by using solid stripper foils in high intensity accelerators has many limitations concerning foil scattering beam losses, short lifetime of the foil including unexpected and rapid foil failure due to ove…