# A linear integral-equation-based computer code for self-amplified spontaneous emission calculations of free-electron lasers.

## Abstract

The linear integral-equation-based computer code RON (Roger Oleg Nikolai), which was recently developed at Argonne National Laboratory, was used to calculate the self-amplified spontaneous emission (SASE) performance of the free-electron laser (FEL) being built at Argonne. Signal growth calculations under different conditions were used to estimate tolerances of actual design parameters and to estimate optimal length of the break sections between undulator segments. Explicit calculation of the radiation field was added recently and a typical angular distribution in the break section is shown. The measured magnetic fields of five undulators were used to calculate the gain for the Argonne FEL. The result indicates that the real undulators for the Argonne FEL (the effect of magnetic field errors alone) will not significantly degrade the FEL performance. The capability to calculate the small-signal gain for an FEL-oscillator is also demonstrated.

- Authors:

- Publication Date:

- Research Org.:
- Argonne National Lab., IL (US)

- Sponsoring Org.:
- US Department of Energy (US)

- OSTI Identifier:
- 750478

- Report Number(s):
- ANL/XFD/CP-99471

TRN: US0204613

- DOE Contract Number:
- W-31-109-ENG-38

- Resource Type:
- Conference

- Resource Relation:
- Conference: 21st International Free Electron Laser Conference, Hamburg (DE), 08/23/1999--08/28/1999; Other Information: PBD: 16 Sep 1999

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 43 PARTICLE ACCELERATORS; ANGULAR DISTRIBUTION; ANL; COMPUTER CODES; DESIGN; FREE ELECTRON LASERS; LASERS; MAGNETIC FIELDS; PERFORMANCE; RADIATIONS; WIGGLER MAGNETS

### Citation Formats

```
Dejus, R. J., Shevchenko, O. A., and Vinokurov, A.
```*A linear integral-equation-based computer code for self-amplified spontaneous emission calculations of free-electron lasers.*. United States: N. p., 1999.
Web.

```
Dejus, R. J., Shevchenko, O. A., & Vinokurov, A.
```*A linear integral-equation-based computer code for self-amplified spontaneous emission calculations of free-electron lasers.*. United States.

```
Dejus, R. J., Shevchenko, O. A., and Vinokurov, A. Thu .
"A linear integral-equation-based computer code for self-amplified spontaneous emission calculations of free-electron lasers.". United States. https://www.osti.gov/servlets/purl/750478.
```

```
@article{osti_750478,
```

title = {A linear integral-equation-based computer code for self-amplified spontaneous emission calculations of free-electron lasers.},

author = {Dejus, R. J. and Shevchenko, O. A. and Vinokurov, A.},

abstractNote = {The linear integral-equation-based computer code RON (Roger Oleg Nikolai), which was recently developed at Argonne National Laboratory, was used to calculate the self-amplified spontaneous emission (SASE) performance of the free-electron laser (FEL) being built at Argonne. Signal growth calculations under different conditions were used to estimate tolerances of actual design parameters and to estimate optimal length of the break sections between undulator segments. Explicit calculation of the radiation field was added recently and a typical angular distribution in the break section is shown. The measured magnetic fields of five undulators were used to calculate the gain for the Argonne FEL. The result indicates that the real undulators for the Argonne FEL (the effect of magnetic field errors alone) will not significantly degrade the FEL performance. The capability to calculate the small-signal gain for an FEL-oscillator is also demonstrated.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1999},

month = {9}

}