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Second Meeting Physics and Experiment Board July 2, 2014

Second Meeting Physics and Experiment Board July 2, 2014. OPT4, photocathode UV output . The module proposed for 61k€ (see price offer) has the following characteristics

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Second Meeting Physics and Experiment Board July 2, 2014

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  1. Second Meeting Physics and Experiment Board July 2, 2014

  2. OPT4, photocathode UV output . The module proposed for 61k€ (see price offer) has the following characteristics • The THG module is inside the compressor module. It allows the out-coupling and utilization of the three wavelengths: fundamental pulse at ~780 nm, the doubled frequency pulse at ~390 nm and the triple frequency pulse at ~260 nm. In the standard version the three wavelengths are not simultaneously available. • The maximum input pulse energy is 6 mJ at 120 fs whatever the repetition rate (beam profile: Gaussian). • The output performances are: • Conversion efficiency for SHG: 30 % for double-frequency conversion in THG module. • Conversion efficiency for THG: 10 % for double-frequency conversion in THG module. • Pulse energy stability: < 1.5 x pulse stability in IR • Beam profile: Gaussian (not measured at FAT and OSAT) • In your laser, the energy of the secondary output is 2,5mJ before compression, >1,5mJ after compression, >150µJ in the THG -150µJ, QE=1e-5 =>Q>1nC -Pulse transverse shaping (aperture)?

  3. Here are some suggestions: I think the most important parameters are: -Plasma density 1e14 to 1e15/cc in five steps -Bunch length (rms length in time): 400ps, 350ps, 450ps -Bunch charge: 1e11p+, 0.8e11, 1.2 e11 and 3e11, 3.5e11 and 2.5e11 -Bunch radius at plasma entrance: 220µm, 180µm and 260µm I think that finding out the effect of those will tell us what to do next. These are already 5x3x3x3=135 simulations ...

  4. suggest a more aggressive plan. ************* Plasma density (5 values): 1; 3; 5; 7; 10e15 cm-3 Bunch length (3): 350; 400; 450 ps Proton bunch population (4): 1.15; 2.5; 3; 3.5e11 (I suggest to reduce the number of low population cases to one value) Bunch radius at plasma entrance (3): 0.18; 0.2; 0.26 mm (I want the baseline value to be in the list) Proton bunch normalized emittance (3): 3.6; 2.8; 2.2 mm mrad (low emittance is possible, as I learned from Alexey) Location of the laser pulse with respect to the proton beam center (5): -6; 0; +6; +12; +18 cm (or equivalently time delay +200; 0; -200; -400; -600 ps) Electron beam charge: no (test electrons) Electron beam delay with respect to the laser pulse: 2.4; 4.4; 6.4; 8.4; 10.4; 12.4; 14.4; 16.4; 18.4; 20.4 cm (all 10 electron beams are simulated in one run) Plasma radius is not varied in this series and is kept constant (1.4 mm). I have compared the constant radius case (1.4 mm) and the baseline case (with radius varied from 1.5 to 1 mm). Final electron spectra are almost the same. At the moment I am uploading the constant radius case to the storage, by the way. ************ To conclude, we need 5*3*4*3*3*5=2700 runs. Issue with data analysis …

  5. Next Meetings: August 26 September 25 (in Greifswald) November 7 December 12 Presence required …

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