Zhirong Huang
Professor of Photon Science, of Particle Physics and Astrophysics and, by courtesy, of Applied Physics
Photon Science Directorate
Academic Appointments
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Professor, Photon Science Directorate
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Professor, Particle Physics and Astrophysics
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Professor (By courtesy), Applied Physics
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Principal Investigator, Stanford PULSE Institute
Honors & Awards
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Fellow, American Physical Society (2015)
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Guest Professorship, Peking University (2014-2015)
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International Free Electron Laser Prize, FEL conference (2014)
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Achievement in Accelerator Physics and Technology Prize, U.S. Particle Accelerator School (2011)
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Division of Beam Physics Dissertation Award, American Physical Society (1998)
Professional Education
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Ph.D., Stanford University, Physics (1998)
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B.S., Caltech, Physics (1992)
2024-25 Courses
- Advanced Topics in Accelerator Physics
APPPHYS 220 (Win) -
Independent Studies (3)
- Curricular Practical Training
PHYSICS 291 (Aut, Win, Spr) - Directed Studies in Applied Physics
APPPHYS 290 (Aut, Win, Spr) - Research
PHYSICS 490 (Aut, Win, Spr)
- Curricular Practical Training
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Prior Year Courses
2021-22 Courses
- Accelerators and Beams: Tools of Discovery and Innovation
PHYSICS 155 (Spr)
- Accelerators and Beams: Tools of Discovery and Innovation
Stanford Advisees
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Doctoral Dissertation Reader (AC)
Paris Franz, Rafi Hessami, Sean Littleton -
Postdoctoral Faculty Sponsor
Roussel Rahman -
Doctoral Dissertation Advisor (AC)
Madison Singleton -
Doctoral Dissertation Co-Advisor (AC)
River Robles
All Publications
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Laguerre-Gaussian Mode Laser Heater for Microbunching Instability Suppression in Free-Electron Lasers.
Physical review letters
2020; 124 (13): 134801
Abstract
Microbunching instability (MBI) driven by beam collective effects is known to be detrimental to high-brightness storage rings, linacs, and free-electron lasers (FELs). One known way to suppress this instability is to induce a small amount of energy spread to an electron beam by a laser heater. The distribution of the induced energy spread greatly affects MBI suppression and can be controlled by shaping the transverse profile of the heater laser. Here, we present the first experimental demonstration of effective MBI suppression using a LG_{01} transverse laser mode and compare the improved results with respect to traditional Gaussian transverse laser mode at the Linac Coherent Light Source. The effects on MBI suppression are characterized by multiple downstream measurements, including longitudinal phase space analysis and coherent radiation spectroscopy. We also discuss the role of LG_{01} shaping in soft x-ray self-seeded FEL emission, one of the most advanced operation modes of a FEL for which controlled suppression of MBI is critical.
View details for DOI 10.1103/PhysRevLett.124.134801
View details for PubMedID 32302180
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Laguerre-Gaussian Mode Laser Heater for Microbunching Instability Suppression in Free-Electron Lasers
PHYSICAL REVIEW LETTERS
2020; 124 (13)
View details for DOI 10.1103/PhysRevLett.124.134801
View details for Web of Science ID 000522196500005
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Simulation analysis and optimization of fresh-slice multistage free-electron lasers
PHYSICAL REVIEW ACCELERATORS AND BEAMS
2020; 23 (3)
View details for DOI 10.1103/PhysRevAccelBeams.23.031304
View details for Web of Science ID 000519997600001
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Tunable isolated attosecond X-ray pulses with gigawatt peak power from a free-electron laser
NATURE PHOTONICS
2020; 14 (1): 30-+
View details for DOI 10.1038/s41566-019-0549-5
View details for Web of Science ID 000504727600007
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Attosecond transient absorption spooktroscopy: a ghost imaging approach to ultrafast absorption spectroscopy.
Physical chemistry chemical physics : PCCP
2019
Abstract
The recent demonstration of isolated attosecond pulses from an X-ray free-electron laser (XFEL) opens the possibility for probing ultrafast electron dynamics at X-ray wavelengths. An established experimental method for probing ultrafast dynamics is X-ray transient absorption spectroscopy, where the X-ray absorption spectrum is measured by scanning the central photon energy and recording the resultant photoproducts. The spectral bandwidth inherent to attosecond pulses is wide compared to the resonant features typically probed, which generally precludes the application of this technique in the attosecond regime. In this paper we propose and demonstrate a new technique to conduct transient absorption spectroscopy with broad bandwidth attosecond pulses with the aid of ghost imaging, recovering sub-bandwidth resolution in photoproduct-based absorption measurements.
View details for DOI 10.1039/c9cp03951a
View details for PubMedID 31793561
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Phase-Stable Self-Modulation of an Electron Beam in a Magnetic Wiggler.
Physical review letters
2019; 123 (21): 214801
Abstract
Electron beams with a sinusoidal energy modulation have the potential to emit subfemtosecond x-ray pulses in a free-electron laser. An energy modulation can be generated by overlapping a powerful infrared laser with an electron beam in a magnetic wiggler. We report on a new infrared source for this modulation, coherent radiation from the electron beam itself. In this self-modulation process, the current spike on the tail of the electron beam radiates coherently at the resonant wavelength of the wiggler, producing a six-period carrier-envelope-phase (CEP)-stable infrared field with gigawatt power. This field creates a few MeV, phase-stable modulation in the electron-beam core. The modulated electron beam is immediately useful for generating subfemtosecond x-ray pulses at any machine repetition rate, and the CEP-stable infrared field may find application as an experimental pump or timing diagnostic.
View details for DOI 10.1103/PhysRevLett.123.214801
View details for PubMedID 31809147
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Phase-Stable Self-Modulation of an Electron Beam in a Magnetic Wiggler
PHYSICAL REVIEW LETTERS
2019; 123 (21)
View details for DOI 10.1103/PhysRevLett.123.214801
View details for Web of Science ID 000498063400006
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Generation and Characterization of Attosecond Pulses from an X-ray Free-electron Laser
IEEE. 2019
View details for Web of Science ID 000482226301273
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Laguerre-Gaussian Mode Laser Heater for Microbunching Instability Suppression in Free Electron Lasers
IEEE. 2019
View details for Web of Science ID 000482226300159
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Microbunch Rotation and Coherent Undulator Radiation from a Kicked Electron Beam
PHYSICAL REVIEW X
2018; 8 (4)
View details for DOI 10.1103/PhysRevX.8.041036
View details for Web of Science ID 000451580200001
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Laguerre-Gaussian and beamlet array as second generation laser heater profiles
PHYSICAL REVIEW ACCELERATORS AND BEAMS
2018; 21 (9)
View details for DOI 10.1103/PhysRevAccelBeams.21.090701
View details for Web of Science ID 000444589700001
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Characterizing isolated attosecond pulses with angular streaking
OPTICS EXPRESS
2018; 26 (4): 4531–47
Abstract
We present a reconstruction algorithm for isolated attosecond pulses, which exploits the phase dependent energy modulation of a photoelectron ionized in the presence of a strong laser field. The energy modulation due to a circularly polarized laser field is manifest strongly in the angle-resolved photoelectron momentum distribution, allowing for complete reconstruction of the temporal and spectral profile of an attosecond burst. We show that this type of reconstruction algorithm is robust against counting noise and suitable for single-shot experiments. This algorithm holds potential for a variety of applications for attosecond pulse sources.
View details for DOI 10.1364/OE.26.004531
View details for Web of Science ID 000426268500073
View details for PubMedID 29475303
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Fresh-slice multicolour X-ray free-electron lasers
NATURE PHOTONICS
2016; 10 (11): 745-750
View details for DOI 10.1038/NPHOTON.2016.201
View details for Web of Science ID 000387393400016
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Polarization control in an X-ray free-electron laser
NATURE PHOTONICS
2016; 10 (7): 468-472
View details for DOI 10.1038/NPHOTON.2016.79
View details for Web of Science ID 000378839600013
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Linac Coherent Light Source: The first five years
REVIEWS OF MODERN PHYSICS
2016; 88 (1)
View details for DOI 10.1103/RevModPhys.88.015007
View details for Web of Science ID 000371723300002
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Analysis of shot noise suppression for electron beams
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2011; 14 (6)
View details for DOI 10.1103/PhysRevSTAB.14.060710
View details for Web of Science ID 000292041200002
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Two-chicane compressed harmonic generation of soft x rays
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2011; 14 (2)
View details for DOI 10.1103/PhysRevSTAB.14.020701
View details for Web of Science ID 000287036500001
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Analysis of slice transverse emittance evolution in a photocathode RF gun
International Workshop on Frontiers in FEL Physics and Related Topics
ELSEVIER SCIENCE BV. 2008: 148–51
View details for DOI 10.1016/j.nima.2008.04.076
View details for Web of Science ID 000258521500035
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Analytical analysis of longitudinal space charge effects for a bunched beam with radial dependence
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2008; 11 (4)
View details for DOI 10.1103/PhysRevSTAB.11.040701
View details for Web of Science ID 000256587600002
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Statistical analysis of crossed undulator for polarization control in a self-amplified spontaneous emission free electron laser
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2008; 11 (3)
View details for DOI 10.1103/PhysRevSTAB.11.030702
View details for Web of Science ID 000254902400003
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Review of x-ray free-electron laser theory
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2007; 10 (3)
View details for DOI 10.1103/PhysRevSTAB.10.034801
View details for Web of Science ID 000245810500017
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Optical klystron enhancement to self-amplified spontaneous emission free electron lasers
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
2006; 9 (7)
View details for DOI 10.1103/PhysRevSTAB.9.070702
View details for Web of Science ID 000240781800004
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Fully coherent x-ray pulses from a regenerative-amplifier free-electron laser
PHYSICAL REVIEW LETTERS
2006; 96 (14)
Abstract
We propose and analyze a regenerative-amplifier free-electron laser (FEL) to produce fully coherent, hard x-ray pulses. The method makes use of narrow-bandwidth Bragg crystals to form an x-ray feedback loop around a relatively short undulator. Self-amplified spontaneous emission (SASE) from the leading electron bunch in a bunch train is spectrally filtered by the Bragg reflectors and is brought back to the beginning of the undulator to interact repeatedly with subsequent bunches in the bunch train. The FEL interaction with these short bunches regeneratively amplifies the radiation intensity and broadens its spectrum, allowing for effective transmission of the x rays outside the crystal bandwidth. The spectral brightness of these x-ray pulses is about 2 to 3 orders of magnitude higher than that from a single-pass SASE FEL.
View details for DOI 10.1103/PhysRevLett.96.144801
View details for PubMedID 16712082
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RADIATION REACTION IN A CONTINUOUS FOCUSING CHANNEL
PHYSICAL REVIEW LETTERS
1995; 74 (10): 1759-1762
View details for Web of Science ID A1995QK07500016