High average power, diode pumped petawatt laser systems: a new generation of lasers enabling precision science and commercial applications

Haefner, C.; Bayramian, A.; Betts, S.; Bopp, R.; Buck, S.; Cupal, Josef; Drouin, M.; Erlandson, Alvin C.; Horáček, Jakub; Horner, J.; Jarboe, J.; Kasl, K.; Kim, D.; Koh, E.; Koubíková, L.; Maranville, W.; Marshall, Christopher D.; Mason, D.; Menapace, Joseph A.; Miller, Phillip E.; Mazurek, Paweł; Naylon, Alexander Jack; Novák, Jakub; Peceli, Davorin; Rosso, Paul A.; Schaffers, Kathleen I.; Sistrunk, Emily; Smith, Daniel; Spinka, Thomas; Stanley, J.; Steele, R.; Stolz, Christopher J.; Suratwala, Tayyab; Telford, S.; Thoma, J.; VanBlarcom, D.; Weiss, J.; Wegner, Paul J.

doi:10.1117/12.2281050

Cited by 48 publications

(24 citation statements)

References 9 publications

(6 reference statements)

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“…On the other hand, the overall thermal load expected in the AMP3 module is about 10 kW (i.e., a factor 2.5-times larger than in DiPOLE 100), with an average heat flow per unit cooling surface as high as 25 W/cm 2 (i.e., an order of magnitude higher); the value of the heat transfer coefficient obtained with water cooling (2.45 W/(cm 2 K) is more than an order of magnitude larger than in the case of He cooling. We notice here that cryogenic He cooling was also recently employed for the cooling of a Ti:Sa multi-slab amplifier for the HAPLS system [16]; however, in that case the system runs at 3.3 Hz, with a pump energy of about 60 J, setting the average pump power to about 200 W. This is much lower than the average pump power expected in the Eupraxia system for any of the amplification stages.…”

Section: Fluid Cooling Simulationsmentioning

confidence: 90%

“…Thermal load issues were addressed by means of water cooling at near room temperature of the end surfaces of the amplification crystals, shaped as disks with a relatively large diameter to thickness ratio, as recently proposed [13]. Alternative approaches were considered, such as the cooling of the crystals by means of a high speed gas flow at cryogenic temperatures, as implemented in the DIPOLE Yb:YAG high energy laser system [14,15], or more recently in the Ti:Sapphire high energy amplifier implemented in the ELI-HAPLS system [16]. This cooling method was nonetheless considered not suitable for this design, as it cannot provide a sufficient heat removal for this application, and it can hardly be scaled up to even higher thermal loads, as will be clarified in the following parts.…”

Section: Power Amplificationmentioning

confidence: 99%

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Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

et al. 2019

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The purpose of the European project EuPRAXIA is to realize a novel plasma accelerator user facility. The laser driven approach sets requirements for a very high performance level for the laser system: pulse peak power in the petawatt range, pulse repetition rate of several tens of Hz, very high beam quality and overall stability of the system parameters, along with 24/7 operation availability for experiments. Only a few years ago these performances were considered unrealistic, but recent advances in laser technologies, in particular in the chirped pulse amplification (CPA) of ultrashort pulses and in high energy, high repetition rate pump lasers have changed this scenario. This paper discusses the conceptual design and the overall architecture of a laser system operating as the driver of a plasma acceleration facility for different applications. The laser consists of a multi-stage amplification chain based CPA Ti:Sapphire, using frequency doubled, diode laser pumped Nd or Yb solid state lasers as pump sources. Specific aspects related to the cooling strategy of the main amplifiers, the operation of pulse compressors at high average power, and the beam pointing diagnostics are addressed in detail.Laser Accelerator) [4], with an average power output of tens of watts. New systems under realization aim to even higher average power levels, such as HAPLS targeting an output power of 300 W. Nonetheless, to address user-level requirements, the average power of ultrafast lasers needs to increase by one or two orders of magnitude.The purpose of the European project EuPRAXIA [5] is to provide a conceptual design for a compact, user-oriented, plasma accelerator with superior beam quality to enable free electron laser operation in the X-ray range. User requirements for an operational facility imply a significant increase of the laser driver output parameters with respect to systems currently available or under development: pulse peak power in the petawatt range, pulse repetition rate of several tens of Hz, as well as very high beam quality and overall stability of the system parameters.A description of the architecture of the laser driver was already published in previous work [6], describing the main parameters and technical solutions. This paper complements the previous one by recalling the general lines of the system architecture and addressing some specific points that are particularly critical for the system operation at high average power levels. These aspects are related to the amplifier's geometrical layout, the cooling solution to address the operation at high average power levels, and the laser beam transport-related issues.

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Section: Fluid Cooling Simulationsmentioning

confidence: 90%

Section: Power Amplificationmentioning

confidence: 99%

Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

et al. 2019

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“…The average power of such sources is currently limited by the low repetition rates of commonly available petawatt lasers. However, new technologies such as diode-pumped solid state lasers can already operate at 10 Hz [16] and will soon be used to pump petawatt lasers [17]. In addition to increased average power, these higher repetition rates will bring other opportunities.…”

Section: Introductionmentioning

confidence: 99%

Laser wakefield acceleration with active feedback at 5 Hz

Dann¹,

Baird²,

Bourgeois³

et al. 2019

Phys. Rev. Accel. Beams

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We describe the use of a genetic algorithm to apply active feedback to a laser wakefield accelerator at a higher power (10 TW) and a lower repetition rate (5 Hz) than previous work. The temporal shape of the drive laser pulse was adjusted automatically to optimize the properties of the electron beam. By changing the software configuration, different properties could be improved. This included the total accelerated charge per bunch, which was doubled, and the average electron energy, which was increased from 22 to 27 MeV. Using experimental measurements directly to provide feedback allows the system to work even when the underlying acceleration mechanisms are not fully understood, and, in fact, studying the optimized pulse shape might reveal new insights into the physical processes responsible. Our work suggests that this technique, which has already been applied with low-power lasers, can be extended to work with petawattclass laser systems.

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“…The average power of ultrafast lasers experienced a 1000× increase as well, with the state-of-the-art milliwatt power levels of ultrafast dye lasers rapidly becoming watt-scale average power levels of Ti:S lasers. The quarter century dominance of Ti:S has seen a further 100× increase, with the current world-leading High-repetition-rate Advanced Petawatt Laser System (HAPLS) laser capable of operating at 300-W average power [9]. For Tajima and Dawson's invention to deliver on its potential of TeV laser-driven particle accelerators, a further 1000× increase in laser average power is necessary to provide luminosities on par with the needs of the particle physics community.…”

Section: Introductionmentioning

confidence: 99%

Wavelength Scaling of Laser Wakefield Acceleration for the EuPRAXIA Design Point

et al. 2019

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Scaling the particle beam luminosity from laser wakefield accelerators to meet the needs of the physics community requires a significant, thousand-fold increase in the average power of the driving lasers. Multipulse extraction is a promising technique capable of scaling high peak power lasers by that thousand-fold increase in average power. However, several of the best candidate materials for use in multipulse extraction amplifiers lase at wavelengths far from the 0.8–1.0 μm region which currently dominates laser wakefield research. In particular, we have identified Tm:YLF, which lases near 1.9 µm, as the most promising candidate for high average power multipulse extraction amplifiers. Current schemes to scale the laser, plasma, and electron beam parameters to alternative wavelengths are unnecessarily restrictive in that they stress laser performance gains to keep plasma conditions constant. In this paper, we present a new and more general scheme for wavelength scaling a laser wakefield acceleration (LWFA) design point that provides greater flexibility in trading laser, plasma, and electron beam parameters within a particular design point. Finally, a multipulse extraction 1.9 µm Tm:YLF laser design meeting the EuPRAXIA project’s laser goals is discussed.

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High average power, diode pumped petawatt laser systems: a new generation of lasers enabling precision science and commercial applications

Abstract: High average power, diode pumped petawatt laser systems: a new generation of lasers enabling precision science and commercial applications,"

Cited by 48 publications

References 9 publications

Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

Conceptual Design of a Laser Driver for a Plasma Accelerator User Facility

Laser wakefield acceleration with active feedback at 5 Hz

Wavelength Scaling of Laser Wakefield Acceleration for the EuPRAXIA Design Point

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