Fellowship In Msca Eupraxia Doctoral Network

Universities and Institutes of Italy
January 31, 2023
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Offerd Salary:Negotiation
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Contract Type:Temporary
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  • Organisation/Company: Laboratori Nazionali di Frascati
  • Research Field: Engineering › Electronic engineering Physics › Applied physics Physics › Electromagnetism Physics › Electronics
  • Researcher Profile: First Stage Researcher (R1)
  • Application Deadline: 31/01/2023 23:00 - Europe/Brussels
  • Location: Italy › Frascati
  • Type Of Contract: Temporary
  • Job Status: Full-time
  • Hours Per Week: 36
  • Offer Starting Date: 01/09/2023
  • Eu Research Framework Programme: HE / MSCA
  • Reference Number: EuPRAXIA-DN
  • Marie Curie Grant Agreement Number: 101073480
  • Theoretical and Technological Studies into Femtosecond

    Synchronization

    The R&D on plasma wakefield acceleration is pushing the requirements on synchronization between short (hundreds of fs) particle or laser beams at higher level. To have a reliable and stable acceleration inside a plasma channel, the arrival time jitter of the beam respect to the pulse exciting a plasma wave (that can be a laser or a particle beam) should be of the order of few fs.

    The activity proposed for the PhD project will be focused on two main topics.

    The first one is the theoretical study of the main jitter sources in a photo- injector (phase noise of accelerating fields, photo-cathode and interaction laser arrival time and so on), together with their impact on beam arrival time. This will be achieved by means of a linear/non-linear model, and the simulation of jitter propagation for different accelerator working points (RF on crest acceleration, RF/magnetic/hybrid compression), using appropriate numerical codes. The study on machine working points could be supported and verified with measurement taken at the SPARCLAB facility.

    The second research topic involves the investigation of technological solutions to mitigate the noise in the machine sub-systems respect to the main facility reference clock, therefore minimizing the final arrival time jitter of the beam at the experiment site. This work is normally done by modern synchronization systems, that employ optical technology developed for telecommunications and can guarantee a reference distribution with a stability of few fs at the client side. Then, each client (particle accelerator sub- system e.g. RF power units, laser oscillators and so on) must be tightly locked to that reference by means of fast feedback loops.

    The most challenging noise source to be reduced is generated by the RF pulsed power stations (modulators and klystrons), since the RF signal lasts only for few microseconds and thus the feedback must react within this short time. A feedback loop of this kind is presently installed at SPARCLAB and it is working with very good performance, reducing the RF phase noise inside a single 4.5 μs pulse by a factor 10 (from hundreds to tens of fs RMS).

    Going towards higher RF frequency (C or X band), the power station can support only 1 - 2 μs long pulses and thus the requirement on the feedback bandwidth increases accordingly. One of the goals of this project is to study and realize a novel electronic device (or at least a prototype) capable to realize a fast intra-pulse feedback, that can be used on very short (< 1 μs) pulses. Furthermore, the test of such fast feedback prototype on a modern solid-state modulator, which naturally exhibit an improved phase noise characteristic (few tens of fs RMS) with respect to PFN technology (hundreds of fs RMS), could represent the cornerstone to drastically reduce the added jitter of an RF power station down to its limit. Such test could be carried out by the student on a solid-state system already operating at SPARCLAB facility at LNF on the C-band RF line.

    The student will be involved in the design of this fast feedback electronics from the beginning and will follow the realization stages of a prototype at the firm site. Also he will be involved at LNF during the complete test at the SPARCLAB facility.

    Benefits

    The EuPRAXIA Doctoral Network (EuPRAXIA-DN) is a new Horizon Europe Marie Skłodowska-Curie Actions Doctoral Network (MSCA-DN), funded by the EU and the UKRI Guarantee Fund and offering 12 high level Fellowships between universities, research centers and industry that will carry out an interdisciplinary and cross-sector plasma accelerator research and training program for the new EuPRAXIA research infrastructure.

    The network will develop a range of scientific and technical innovations and provide a cutting-edge interdisciplinary training that is expected to boost the career prospects of its Fellows.

    Eligibility criteria

    Mobility

    Researchers can be of any nationality. They must comply with the rule for mobility.

    Researchers are normally required to undertake trans-national mobility (i.e. move from one country to another) when taking up their appointment. One general rule applies to the appointment of researchers in a network:

    At the time of recruitment by the host organisation, researchers must not have resided or carried out their main activity (work, studies, etc) in the country of their host organisation for more than 12 months in the 3 years immediately prior to the reference date.

    Short stays such as holidays and/or compulsory national service are not taken into account. As far as international European interest organisations or international organisations are concerned, this rule does not apply to the hosting of eligible researchers.However the appointed researcher must not have spent more than 12 months in the 3 years immediately prior to the reference deadline for submission of proposals or recruitment by the host organisation, depending on the action, in the same appointing organisation.

    Selection process

    Applications will be collected by the network coordinator (INFN) and then allocated to the respective host organization which will organize a panel interview. You can indicate in your application if you wish to apply also for other positions within the network and in this case agree to sharing your information with these additional organisations.

    Web site for additional job details

    https: // www. eupraxia-dn.org/vacancies

    Offer Requirements
  • REQUIRED EDUCATION LEVEL
  • Engineering: Master Degree or equivalent

    Physics: Master Degree or equivalent

  • REQUIRED LANGUAGES
  • ENGLISH: Good

    Skills/Qualifications

    We are look for a dynamic, pro-active student who ideally has gained already hands-on experience in laboratory-based studies. Good analytical skills and an understanding of the fundamental electromagnetism and radiofrequency concepts. A background in accelerator R&D will be an asset, however, comprehensive training in all relevant areas will be provided.

    Specific Requirements

    Researchers can be of any nationality. They must comply with the rule for mobility. Researchers are normally required to undertake trans-national mobility (i.e. move from one country to another) when taking up their appointment. One general rule applies to the appointment of researchers in a network:

    - At the time of recruitment by the host organisation, researchers must not have resided or carried out their main activity (work, studies, etc) in the country of their host organisation for more than 12 month in the 3 years immediately prior to the reference date.

    - Short stays such as holidays and/or compulsory national service are not taken into account. As far as international European interest organisations or international organisations are concerned, this rule does not apply to the hosting of eligible researchers. However the appointed researcher must not have spent more than 12 months in the 3 years immediately prior to the reference deadline for submission of proposals or recruitment by the host organisation, depending on the action, in the same appointing organisation.

    Contact Information
  • Organisation/Company: Laboratori Nazionali di Frascati
  • Department: Accelerato Division
  • Organisation Type: Research Laboratory
  • Website: https:// www. lnf.infn.it/
  • E-Mail: marco.bellaveglia@lnf.infn.it
  • Country: Italy
  • City: Frascati
  • Postal Code: 00044
  • Street: Via Enrico Fermi 54
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