| 1. |
- Abramowicz, H., et al.
(författare)
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Conceptual design report for the LUXE experiment
- 2021
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Ingår i: European Physical Journal-Special Topics. - : Springer Science and Business Media LLC. - 1951-6355 .- 1951-6401. ; 230:11, s. 2445-2560
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Tidskriftsartikel (refereegranskat)abstract
- This Conceptual Design Report describes LUXE (Laser Und XFEL Experiment), an experimental campaign that aims to combine the high-quality and high-energy electron beam of the European XFEL with a powerful laser to explore the uncharted terrain of quantum electrodynamics characterised by both high energy and high intensity. We will reach this hitherto inaccessible regime of quantum physics by analysing high-energy electron-photon and photon-photon interactions in the extreme environment provided by an intense laser focus. The physics background and its relevance are presented in the science case which in turn leads to, and justifies, the ensuing plan for all aspects of the experiment: Our choice of experimental parameters allows (i) field strengths to be probed where the coupling to charges becomes non-perturbative and (ii) a precision to be achieved that permits a detailed comparison of the measured data with calculations. In addition, the high photon flux predicted will enable a sensitive search for new physics beyond the Standard Model. The initial phase of the experiment will employ an existing 40 TW laser, whereas the second phase will utilise an upgraded laser power of 350 TW. All expectations regarding the performance of the experimental set-up as well as the expected physics results are based on detailed numerical simulations throughout.
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| 2. |
- Afanaciev, K.G., et al.
(författare)
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Investigation of the radiation hardness of GaAs sensors in an electron beam
- 2012
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Ingår i: Journal of Instrumentation. - 1748-0221. ; 7:11
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Tidskriftsartikel (refereegranskat)abstract
- A compact and finely grained sandwich calorimeter is designed to instrument the very forward region of a detector at a future e+e- collider. The calorimeter will be exposed to low energy e+e - pairs originating from beamstrahlung, resulting in absorbed doses of about one MGy per year. GaAs pad sensors interleaved with tungsten absorber plates are considered as an option for this calorimeter. Several Cr-doped GaAs sensor prototypes were produced and irradiated with 8.5-10 MeV electrons up to a dose of 1.5 MGy. The sensor performance was measured as a function of the absorbed dose.
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| 3. |
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| 4. |
- Marchev, G., et al.
(författare)
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Sub-nanosecond, 1-kHz, low-threshold, non-critical OPO based on periodically-poled KTP crystal pumped at 1064 nm
- 2012
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Ingår i: Nonlinear Frequency Generation And Conversion. - : SPIE - International Society for Optical Engineering. - 9780819488831 ; , s. 82400D-
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Konferensbidrag (refereegranskat)abstract
- We employed a 9-mm long periodically-poled KTiOPO 4 (PPKTP) crystal with a domain inversion period of 37.8 ÎŒm in an optical parametric oscillator (OPO) to generate sub-nanosecond pulses around 2.8 ÎŒm. With a 1-cm long OPO cavity in a singly resonant configuration with double pass pumping the OPO threshold was 110 ÎŒJ at 1064 nm (1-ns pump pulses at 1064 nm). The maximum idler output energy reached 110 ÎŒJ (quantum conversion efficiency of 32.5%). The signal pulse duration (FWHM) was 0.72 ns and the estimated idler pulse duration was 0.76 ns. At room temperature the signal and idler wavelengths were at 1722 and 2786 nm.
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