H.P. Freund

3.1k total citations
152 papers, 2.0k citations indexed

About

H.P. Freund is a scholar working on Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics and Aerospace Engineering. According to data from OpenAlex, H.P. Freund has authored 152 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 135 papers in Electrical and Electronic Engineering, 116 papers in Atomic and Molecular Physics, and Optics and 112 papers in Aerospace Engineering. Recurrent topics in H.P. Freund's work include Particle Accelerators and Free-Electron Lasers (123 papers), Gyrotron and Vacuum Electronics Research (113 papers) and Particle accelerators and beam dynamics (112 papers). H.P. Freund is often cited by papers focused on Particle Accelerators and Free-Electron Lasers (123 papers), Gyrotron and Vacuum Electronics Research (113 papers) and Particle accelerators and beam dynamics (112 papers). H.P. Freund collaborates with scholars based in United States, Netherlands and Italy. H.P. Freund's co-authors include A. K. Ganguly, P.G. O’Shea, P. Sprangle, D.E. Pershing, R.H. Jackson, V. L. Granatstein, E.G. Zaidman, S.G. Biedroń, K. Papadopoulos and G.R. Neil and has published in prestigious journals such as Science, Physical Review Letters and SHILAP Revista de lepidopterología.

In The Last Decade

H.P. Freund

142 papers receiving 1.9k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
H.P. Freund United States	26	1.7k	1.4k	1.2k	422	342	152	2.0k
W.M. Fawley United States	22	1.5k 0.9×	909 0.6×	942 0.8×	731 1.7×	528 1.5×	131	2.0k
V. Yakimenko United States	24	1.3k 0.8×	973 0.7×	574 0.5×	347 0.8×	1.1k 3.2×	142	2.1k
B.E. Carlsten United States	21	1.3k 0.7×	1.0k 0.7×	978 0.8×	219 0.5×	224 0.7×	176	1.6k
P. Piot United States	20	1.1k 0.6×	696 0.5×	672 0.6×	248 0.6×	298 0.9×	134	1.3k
G. Travish United States	17	996 0.6×	744 0.5×	425 0.4×	269 0.6×	422 1.2×	99	1.4k
K. Kusche United States	20	895 0.5×	891 0.6×	295 0.3×	273 0.6×	741 2.2×	77	1.6k
L. Serafini Italy	21	1.0k 0.6×	600 0.4×	639 0.5×	558 1.3×	809 2.4×	162	1.6k
R. Iverson United States	12	747 0.4×	418 0.3×	394 0.3×	334 0.8×	860 2.5×	52	1.3k
M. Tigner United States	13	958 0.6×	443 0.3×	810 0.7×	221 0.5×	411 1.2×	93	1.4k
H. Loos United States	19	1.4k 0.8×	754 0.5×	459 0.4×	865 2.0×	454 1.3×	77	1.8k

Countries citing papers authored by H.P. Freund

Since Specialization

Citations

This map shows the geographic impact of H.P. Freund's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by H.P. Freund with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites H.P. Freund more than expected).

Fields of papers citing papers by H.P. Freund

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by H.P. Freund. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by H.P. Freund. The network helps show where H.P. Freund may publish in the future.

Co-authorship network of co-authors of H.P. Freund

This figure shows the co-authorship network connecting the top 25 collaborators of H.P. Freund. A scholar is included among the top collaborators of H.P. Freund based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with H.P. Freund. H.P. Freund is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Freund, H.P., et al.. (2024). Harmonic generation in a terawatt x-ray free-electron laser. Physica Scripta. 99(6). 65512–65512.

Freund, H.P., M.V. Fazio, P.G. O’Shea, & R.B. True. (2023). Design Considerations for Compact High-Average Power Free-Electron Lasers/Masers at Terahertz Frequencies. IEEE Transactions on Plasma Science. 51(3). 888–897. 1 indexed citations

Freund, H.P. & Thomas M. Antonsen. (2023). Principles of Free Electron Lasers. 5 indexed citations

Lumpkin, A.H., H.P. Freund, Matthias Reinsch, & Petrus J.M. van der Slot. (2023). Wakefields in superconducting rf cavities and the impact on vacuum ultraviolet free-electron laser oscillator performance. Physical Review Accelerators and Beams. 26(10). 1 indexed citations

Slot, Petrus J.M. van der & H.P. Freund. (2021). . SHILAP Revista de lepidopterología. 5 indexed citations

Freund, H.P. & Petrus J.M. van der Slot. (2021). Variable polarization states in free-electron lasers. Journal of Physics Communications. 5(8). 85011–85011. 7 indexed citations

Freund, H.P.. (2013). Comparison of free-electron laser amplifiers based on a step-tapered optical klystron and a conventional tapered wiggler. Physical Review Special Topics - Accelerators and Beams. 16(6). 5 indexed citations

Freund, H.P., Dinh C. Nguyen, & B.E. Carlsten. (2012). Three-dimensional analysis of prebunched electron beams in an x-ray free-electron laser. Physical Review Special Topics - Accelerators and Beams. 15(3). 12 indexed citations

Read, Michael, et al.. (2010). P2-27: A vector finite element Helmholtz solver for nemesis. 275–276.

10.

Freund, H.P., L. Giannessi, & W. H. Miner. (2008). The effect of shot noise on the start up of the fundamental and harmonics in free-electron lasers. Journal of Applied Physics. 104(12). 14 indexed citations

11.

Kodis, M.A., et al.. (2002). Twystrode experiments with tapered and untapered helices. 795–798. 1 indexed citations

12.

Biedroń, S.G., S.V. Milton, & H.P. Freund. (2000). Modular approach to achieving the next-generation x-ray light source.. University of North Texas Digital Library (University of North Texas). 1 indexed citations

13.

Freund, H.P. & V.L. Granatstein. (1998). Long-wavelength free-electron lasers in 1997. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 407(1-3). 30–33. 2 indexed citations

14.

Freund, H.P., P.G. O’Shea, J. M. J. Madey, & Charles P. Neuman. (1997). <title>Free-electron laser design operating in the SASE mode using the PALADIN wiggler</title>. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 3154. 144–149. 1 indexed citations

15.

Pershing, D.E., et al.. (1996). Design of a “slow-wave” ubitron. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 375(1-3). 230–232. 4 indexed citations

16.

Freund, H.P., Michael Read, R.H. Jackson, D.E. Pershing, & J. M. Taccetti. (1995). Design study of a G-band FEL amplifier for application to cyclotron resonant heating in magnetic fusion reactors. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 358(1-3). 163–166. 1 indexed citations

17.

Freund, H.P., et al.. (1994). Wiggler imperfections in free-electron lasers. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 341(1-3). 225–229. 3 indexed citations

18.

Bidwell, S.W., Thomas M. Antonsen, W.W. Destler, et al.. (1992). Development of a high power millimeter wave free-electron laser amplifier. International Conference on High-Power Particle Beams. 3. 1728–1733. 1 indexed citations

19.

Freund, H.P., Ronald C. Davidson, & Douglas Kirkpatrick. (1991). Thermal effects on the linear gain in free-electron lasers. IEEE Journal of Quantum Electronics. 27(12). 2550–2559. 10 indexed citations

20.

Freund, H.P., R. A. Kehs, & V. L. Granatstein. (1985). Electron orbits in combined electromagnetic wiggler and axial guide magnetic fields. IEEE Journal of Quantum Electronics. 21(7). 1080–1082. 32 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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