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Paper   IPM / Particles And Accelerator / 13386
School of Particles and Accelerator
  Title:   Linac4 low energy beam measurements with negative hydrogen ions
1.  R Scrivens
2.  G Bellodi
3.  O Crettiez
4.  V Dimov
5.  D Gerard
6.  E Granemann Souza
7.  R Guida
8.  J Hansen
9.  J.-B Lallement
10.  J Lettry
11.  A Lombardi
12.  O Midttun
13.  C Pasquino
14.  U Raich
15.  B Riffaud
16.  F Roncarolo
17.  C. A Valerio-Lizarraga
18.  J Wallner
19.  M Yarmohammadi Satri
20.  T Zickler
  Status:   Published
  Journal: Review of Scientific Instruments
  No.:  02A729
  Vol.:  85
  Year:  2014
  Pages:   02A729 - 02A729-3
  Supported by:  IPM
Linac4, a 160 MeV normal-conducting H- linear accelerator, is the first step in the upgrade of the beam intensity available from the LHC proton injectors at CERN. The Linac4 Low Energy Beam Transport (LEBT) line from the pulsed 2 MHz RF driven ion source, to the 352 MHz RFQ (Radiofrequency Quadrupole) has been built and installed at a test stand, and has been used to transport and match to the RFQ a pulsed 14 mA H�?? beam at 45 keV. A temporary slit-and-grid emittance measurement system has been put in place to characterize the beam delivered to the RFQ. In this paper a description of the LEBT and its beam diagnostics is given, and the results of beam emittance measurements and beam transmission measurements through the RFQ are compared with the expectation

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