IBIC2016 - List of Authors (Palumbo, L.)

Paper	Title	Page
TUPG74	Spot Size Measurements in the ELI-NP Compton Gamma Source	532
	F. Cioeta, E. Chiadroni, G. Di Pirro, G. Franzini, V. Shpakov, A. Stella, A. Variola INFN/LNF, Frascati (Roma), Italy A. Cianchi INFN-Roma II, Roma, Italy M. Marongiu INFN-Roma, Roma, Italy A. Mostacci, L. Palumbo University of Rome La Sapienza, Rome, Italy
	A high brightness electron Linac is being built in the Compton Gamma Source at the ELI Nuclear Physics facility in Romania. To achieve the design luminosity, a train of 32, 16 ns spaced, bunches with a nominal charge of 250 pC will collide with the laser beam in the interaction point. Electron beam spot size is measured with an OTR (optical transition radiation) profile monitors. In order to measure the beam properties, the optical radiation detecting system must have the necessary accuracy and resolution. This paper deals with the studies of different optic configurations to achieve the magnification, resolution and accuracy desired considering design and technological constraints; we will compare several configurations of the optical detection line to justify the one chosen for the implementation in the Linac.
	Poster TUPG74 [44.049 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG74
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TUPG75	Thermal Simulations for Optical Transition Radiation Screen for ELI-NP Compton Gamma Source	536
	F. Cioeta, D. Alesini, A. Falone, V.L. Lollo, L. Pellegrino, A. Variola INFN/LNF, Frascati (Roma), Italy M. Ciambrella, A. Mostacci, L. Palumbo University of Rome La Sapienza, Rome, Italy M. Marongiu, V. Pettinacci INFN-Roma, Roma, Italy
	The Gamma Beam Source (ELI-GBS) is a high brightness electron LINAC that is being built at the ELI Nuclear Physics (ELI-NP) facility in Romania. The ELI-GBS aims to produce high quality gamma beam through Compton Backscattering. A train of 32 bunches at 100Hz with a nominal charge of 250pC is accelerated up to 740 MeV. Two interaction points with an IR Laser beam produces the gamma beam at two different energies. In order to measure the electron beam spot size and the beam properties, the LINAC is equipped with several optical transition radiation (OTR) profile monitors. Those OTR screens must sustain the thermal and mechanical stress due to the energy deposited by the bunches. We present a numerical (ANSYS) study of the thermo-mechanical issues due to beam energy deposition in the screens; our analysis will cover both the steady state and transient regime.
	Poster TUPG75 [41.161 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG75
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WEPG44	Longitudinal Phase Space Measurement at the ELI-NP Compton Gamma Source	732
	L. Sabato U. Sannio, Benevento, Italy D. Alesini, G. Franzini, C. Vaccarezza, A. Variola INFN/LNF, Frascati (Roma), Italy P. Arpaia, A. Liccardo Naples University Federico II, Science and Technology Pole, Napoli, Italy A. Giribono, A. Mostacci, L. Palumbo University of Rome La Sapienza, Rome, Italy L. Sabato INFN-Napoli, Napoli, Italy
	Virtual bunch length measurement can be carried out by means of ELEGANT code for tracking the bunch particles from RF deflector to the screen. The technique relies on the correlation between the bunch longitudinal coordinate and transverse coordinates induced through a RF deflector. Therefore, the bunch length measurement can be carried out measuring the vertical spot size at the screen, placed after the RF deflector. The deflecting voltage amplitude affects the resolution. Adding a dispersive element, e.g. a magnetic dipole between RF deflector and the screen, the full longitudinal phase space can be measured. In this paper, we discuss some issues relevant for the electron linac of the Compton source at the Extreme Light Infrastructure - Nuclear Physics (ELI-NP).
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG44
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Spot Size Measurements in the ELI-NP Compton Gamma Source

532

F. Cioeta, E. Chiadroni, G. Di Pirro, G. Franzini, V. Shpakov, A. Stella, A. Variola
INFN/LNF, Frascati (Roma), Italy
A. Cianchi
INFN-Roma II, Roma, Italy
M. Marongiu
INFN-Roma, Roma, Italy
A. Mostacci, L. Palumbo
University of Rome La Sapienza, Rome, Italy

A high brightness electron Linac is being built in the Compton Gamma Source at the ELI Nuclear Physics facility in Romania. To achieve the design luminosity, a train of 32, 16 ns spaced, bunches with a nominal charge of 250 pC will collide with the laser beam in the interaction point. Electron beam spot size is measured with an OTR (optical transition radiation) profile monitors. In order to measure the beam properties, the optical radiation detecting system must have the necessary accuracy and resolution. This paper deals with the studies of different optic configurations to achieve the magnification, resolution and accuracy desired considering design and technological constraints; we will compare several configurations of the optical detection line to justify the one chosen for the implementation in the Linac.

Poster TUPG74 [44.049 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG74

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPG75

Thermal Simulations for Optical Transition Radiation Screen for ELI-NP Compton Gamma Source

536

F. Cioeta, D. Alesini, A. Falone, V.L. Lollo, L. Pellegrino, A. Variola
INFN/LNF, Frascati (Roma), Italy
M. Ciambrella, A. Mostacci, L. Palumbo
University of Rome La Sapienza, Rome, Italy
M. Marongiu, V. Pettinacci
INFN-Roma, Roma, Italy

The Gamma Beam Source (ELI-GBS) is a high brightness electron LINAC that is being built at the ELI Nuclear Physics (ELI-NP) facility in Romania. The ELI-GBS aims to produce high quality gamma beam through Compton Backscattering. A train of 32 bunches at 100Hz with a nominal charge of 250pC is accelerated up to 740 MeV. Two interaction points with an IR Laser beam produces the gamma beam at two different energies. In order to measure the electron beam spot size and the beam properties, the LINAC is equipped with several optical transition radiation (OTR) profile monitors. Those OTR screens must sustain the thermal and mechanical stress due to the energy deposited by the bunches. We present a numerical (ANSYS) study of the thermo-mechanical issues due to beam energy deposition in the screens; our analysis will cover both the steady state and transient regime.

Poster TUPG75 [41.161 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG75

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPG44

Longitudinal Phase Space Measurement at the ELI-NP Compton Gamma Source

732

L. Sabato
U. Sannio, Benevento, Italy
D. Alesini, G. Franzini, C. Vaccarezza, A. Variola
INFN/LNF, Frascati (Roma), Italy
P. Arpaia, A. Liccardo
Naples University Federico II, Science and Technology Pole, Napoli, Italy
A. Giribono, A. Mostacci, L. Palumbo
University of Rome La Sapienza, Rome, Italy
L. Sabato
INFN-Napoli, Napoli, Italy

Virtual bunch length measurement can be carried out by means of ELEGANT code for tracking the bunch particles from RF deflector to the screen. The technique relies on the correlation between the bunch longitudinal coordinate and transverse coordinates induced through a RF deflector. Therefore, the bunch length measurement can be carried out measuring the vertical spot size at the screen, placed after the RF deflector. The deflecting voltage amplitude affects the resolution. Adding a dispersive element, e.g. a magnetic dipole between RF deflector and the screen, the full longitudinal phase space can be measured. In this paper, we discuss some issues relevant for the electron linac of the Compton source at the Extreme Light Infrastructure - Nuclear Physics (ELI-NP).

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG44

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)