skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Effect of Nozzle Curvature on Supersonic Gas Jets Used in Laser-Plasma Acceleration

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/5.0058963· OSTI ID:1817644
 [1];  [2];  [2];  [1];  [2];  [1];  [2];  [2]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Supersonic gas jets produced by converging-diverging (C-D) nozzles are commonly used as targets for laser-plasma acceleration (LPA) experiments. A major point of interest for these targets is the gas density at the region of interaction where the laser ionizes the gas plume to create a plasma, providing the acceleration structure. Tuning the density profiles at this interaction region is crucial to LPA optimization. A "flat-top" density profile is desired at this line of interaction to control laser propagation and high energy electron acceleration, while a short high-density profile is often preferred for acceleration of lower-energy tightly-focused laser-plasma interactions. A particular design parameter of interest is the curvature of the nozzle's diverging section. We examine three nozzle designs with different curvatures: the concave "bell", straight conical and convex "trumpet" nozzles. We demonstrate that, at mm-scale distances from the nozzle exit, the trumpet and straight nozzles, if optimized, produce "flat-top" density profiles whereas the bell nozzle creates focused regions of gas with higher densities. An optimization procedure for the trumpet nozzle is derived and compared to the straight nozzle optimization process. We find that the trumpet nozzle, by providing an extra parameter of control through its curvature, is more versatile for creating flat-top profiles and its optimization procedure is more refined compared to the straight nozzle and the straight nozzle optimization process. Furthermore, we present results for different nozzle designs from computational fluid dynamics (CFD) simulations performed with the program ANSYS Fluent and verify them experimentally using neutral density interferometry.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1817644
Alternate ID(s):
OSTI ID: 1865079
Journal Information:
Physics of Plasmas, Vol. 28, Issue 9; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

References (71)

Controlling the Self-Injection Threshold in Laser Wakefield Accelerators journal October 2018
Plasma-Density-Gradient Injection of Low Absolute-Momentum-Spread Electron Bunches journal May 2008
Electron Acceleration by a Wake Field Forced by an Intense Ultrashort Laser Pulse journal November 2002
Wall slip for complex liquids – Phenomenon and its causes journal July 2018
Gas density structure of supersonic flows impinged on by thin blades for laser–plasma accelerator targets journal June 2020
Direct longitudinal laser acceleration of electrons in free space journal February 2016
Molecular Simulations of Knudsen Wall-slip: Effect of Wall Morphology journal October 2003
Multi-GeV Electron Beams from Capillary-Discharge-Guided Subpetawatt Laser Pulses in the Self-Trapping Regime journal December 2014
Quasi-monoenergetic laser-plasma acceleration of electrons to 2 GeV journal June 2013
Stable multi-GeV electron accelerator driven by waveform-controlled PW laser pulses journal August 2017
Electromagnetically driven, fast opening and closing gas jet valve journal March 2011
Laser wake field acceleration: the highly non-linear broken-wave regime journal April 2002
Enhancement of Electron Energy to the Multi-GeV Regime by a Dual-Stage Laser-Wakefield Accelerator Pumped by Petawatt Laser Pulses journal October 2013
Measured Emittance Dependence on the Injection Method in Laser Plasma Accelerators journal September 2017
Controlled injection and acceleration of electrons in plasma wakefields by colliding laser pulses journal December 2006
Measurements of the Critical Power for Self-Injection of Electrons in a Laser Wakefield Accelerator journal November 2009
Particle injection into the wave acceleration phase due to nonlinear wake wave breaking journal November 1998
Principles of Plasma Diagnostics book January 2009
Molecular Dynamics Simulations of Slip on Curved Surfaces journal June 2016
Principles of Optics book January 1999
A laser–plasma accelerator producing monoenergetic electron beams journal September 2004
Characterization of neutral density profile in a wide range of pressure of cylindrical pulsed gas jets journal June 2000
GeV electron beams from a centimetre-scale accelerator journal September 2006
3D printing of gas jet nozzles for laser-plasma accelerators journal July 2016
Petawatt Laser Guiding and Electron Beam Acceleration to 8 GeV in a Laser-Heated Capillary Discharge Waveguide journal February 2019
Electron Rephasing in a Laser-Wakefield Accelerator journal October 2015
Betatron radiation from density tailored plasmas journal June 2008
Electron Bunch Length Measurements from Laser-Accelerated Electrons Using Single-Shot THz Time-Domain Interferometry journal February 2010
Shock-Front Injector for High-Quality Laser-Plasma Acceleration journal May 2013
Generation of 100-MeV Attosecond Electron Bunches with Terawatt Few-Cycle Laser Pulses journal April 2021
Transformation of Observed Radiances into Radial Distribution of the Emission of a Plasma* journal January 1961
Laser Electron Accelerator journal July 1979
High density gas jet nozzle design for laser target production journal July 2001
Collective Deceleration of Laser-Driven Electron Bunches journal September 2016
Characterization of supersonic and subsonic gas targets for laser wakefield electron acceleration experiments journal January 2019
Formulation of the k-w Turbulence Model Revisited journal November 2008
Publisher’s Note: Near-GeV Acceleration of Electrons by a Nonlinear Plasma Wave Driven by a Self-Guided Laser Pulse [Phys. Rev. Lett. 103 , 035002 (2009)] journal July 2009
Supersonic gas jets for laser-plasma experiments journal May 2012
Laser wakefield accelerated electron beams and betatron radiation from multijet gas targets journal October 2020
Time Characterization of High Density Gas Jet from a Pulsed Supersonic Nozzle via Laser Produced Plasma journal July 2006
Monoenergetic beams of relativistic electrons from intense laser–plasma interactions journal September 2004
Design and characterization of pulsed uniform supersonic expansions for chemical applications journal September 1995
Design and characterization of supersonic nozzles for wide focus laser-plasma interactions journal October 2009
Integrated supersonic wind tunnel nozzle journal November 2019
Plasma wakefield generation and electron acceleration in a self-modulated laser wakefield accelerator experiment journal May 1997
“The Even-Lavie valve as a source for high intensity supersonic beam” journal December 2015
Nonlinear Optics in Relativistic Plasmas and Laser Wake Field Acceleration of Electrons journal July 1996
Development of gas jet targets for laser-plasma experiments at near-critical density journal June 2019
The Role of Nozzle Contour on Supersonic Jet Thrust and Acoustics journal November 2014
Gas jet targets for laser plasma interaction studies journal July 1982
Tunable laser plasma accelerator based on longitudinal density tailoring journal August 2011
Demonstration of stable long-term operation of a kilohertz laser-plasma accelerator journal September 2020
Density-transition based electron injector for laser driven wakefield accelerators journal September 2010
Towards Understanding the Influence of Gradient Reconstruction Methods on Unstructured Flowsimulations journal June 2017
Compact quasi-monoenergetic photon sources from laser-plasma accelerators for nuclear detection and characterization
  • Geddes, Cameron G. R.; Rykovanov, Sergey; Matlis, Nicholas H.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 350 https://doi.org/10.1016/j.nimb.2015.01.013
journal May 2015
Stable generation of GeV-class electron beams from self-guided laser–plasma channels journal August 2008
High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding journal September 2004
Optical Dispersion and Molar Refraction at Zero Frequency for Compressed Nitrogen, Argon, and Carbon Dioxide Measured as Functions of Density journal August 1940
Physics of laser-driven plasma-based electron accelerators journal August 2009
Control of quasi-monoenergetic electron beams from laser-plasma accelerators with adjustable shock density profile journal April 2018
Shock assisted ionization injection in laser-plasma accelerators journal November 2015
Observation of Ultrahigh Gradient Electron Acceleration by a Self-Modulated Intense Short Laser Pulse journal May 1995
Supersonic gas-jet characterization with interferometry and Thomson scattering on the OMEGA Laser System journal October 2018
Density measurements of a high-density pulsed gas jet for laser-plasma interaction studies journal October 1994
High-charge relativistic electron bunches from a kHz laser-plasma accelerator journal January 2018
On the Structure of Jets from Highly Underexpanded Nozzles Into Still Air journal January 1959
The characterization of a high-density gas jet journal October 1997
Optical Guiding in Meter-Scale Plasma Waveguides journal August 2020
Enhancement of betatron x rays through asymmetric laser wakefield generated in transverse density gradients journal September 2018
Electron acceleration from the breaking of relativistic plasma waves journal October 1995
Control of tunable, monoenergetic laser-plasma-accelerated electron beams using a shock-induced density downramp injector journal May 2017

Similar Records

A Novel Gas Jet for Laser Wakefield Acceleration
Technical Report · Thu Aug 30 00:00:00 EDT 2012 · OSTI ID:1817644

?Linear Gas Jet with Tailored Density Profile"
Technical Report · Mon Dec 10 00:00:00 EST 2012 · OSTI ID:1817644

Transient behavior of a supersonic three-dimensional micronozzle with an intersecting capillary
Journal Article · Tue Feb 16 00:00:00 EST 2016 · Journal of Applied Physics · OSTI ID:1817644