Paper |
Title |
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TUPC124 |
Laser Wire Emittance Measurement Line at CLIC* |
1308 |
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- H. Garcia, Yu.A. Kubyshin
UPC, Barcelona, Spain
- T. Aumeyr, G.A. Blair
JAI, Oxford, United Kingdom
- D. Schulte, F. Stulle
CERN, Geneva, Switzerland
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A precise measurement of the transverse beam size and beam emittances upstream of the final focus is essential for ensuring the full luminosity at future linear colliders. A scheme for the emittance measurements at the RTML line of the CLIC using laser-wire beam profile monitors is described. A lattice of the measurement line is discussed and results of simulations of statistical and machine-related errors and of their impact on the accuracy of the emittance reconstruction are given. Modes of operation of the laser wire system and its main characteristics are discussed.
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TUPC158 |
Micron-scale Laser-wire at the ATF-II at KEK Commissioning and Results |
1401 |
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- L.J. Nevay, G.A. Blair, S.T. Boogert, L. Corner, L.C. Deacon, V. Karataev, R. Walczak
JAI, Oxford, United Kingdom
- A.S. Aryshev, N. Terunuma, J. Urakawa
KEK, Ibaraki, Japan
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We present the first results from the commissioning of the upgraded laser-wire experiment at the Accelerator Test Facility 2 (ATF2) at KEK. A new laser transport line and beam diagnostics were used to collide 150 mJ, 167 ps long laser pulses with 1.28 GeV, 30 ps long electron bunches to measure the vertical transverse size. Additionally, a new detector was installed with a reduced area for lower background. Initial scans showing a convoluted beam size of 19.2 ± 0.2 microns were used to tune the electron beam optics and reduce this down to 8.1 ± 0.1 microns. Laser pulse energy and charge dependency were investigated showing a linear relationship in both with a minimum laser energy of 20 mJ required for observable signal with this laser and setup.
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