□ Information for R&D beamtime

PAL-XFEL provides a general user beamtime of 140 days using well-established equipment. At the same time, PAL-XFEL listens to users’ demands of pioneering scientific research using new experimental techniques and invites users for new scientific research by using instruments newly developed by PAL-XFEL. The R&D beamtime operated by PAL-XFEL is an example of expanding XFEL capabilities for new science. We are open for innovative and challenging researches utilizing R&D beamtime and always welcome to discuss with us.

For the first half of 2023 R&D beamtime, PAL-XFEL calls for proposals for the experiments that meet the following criteria:

-          XFEL based dark-field X-ray microscopy

-          Time-resolved X-ray scattering for gas-phase sample

 

R&D beamtime proposals will be decided by PAL internal review based on the provided documentation. Please contact for more details and submission of the proposal to PAL-XFEL Beamline (palxfel-beamline@postech.ac.kr)

 

□ Schedule for R&D beamtime

 Although the PAL-XFEL takes the R&D proposal throughout the year, the evaluation will be carried out on the following schedule.

-           The proposal deadline for the first half-year of 2023: Nov 4, 2022

-           The result will be announced within two weeks after the deadline.

 

□ PAL-XFEL Source Characteristics

ㅇ Hard X-ray FEL Beam Characteristics

⦁ Available XFEL energy: 2.20* - 15 keV

⦁ Available XFEL mode: SASE FEL, monochromatic FEL, self-seeded FEL*

⦁ Repetition rate: 10 Hz, 30 Hz, 60 Hz*

(* Experiment at the tender X-ray (<5 keV)/ self-seeded FEL/ 60 Hz operation should be discussed with beamline staff prior to proposal submission.)

⦁ Pulse duration (FWHM): < 50 fs

⦁ Bandwidth: < 0.4 % (pink)

⦁ Photon flux: > 1.0 × 10¹¹ phs/pulse

⦁ Focused XFEL beam diameter

XSS beamline: > 10 μm (FWHM, > 5 keV,) by CRL

NCI beamline: H × V ~ 5 μm × 5 μm @ 5 keV, ~ 2 μm × 2 μm @ 9.7 keV (FWHM) by KB mirrors

ㅇ Soft X-ray FEL Beam Characteristics

⦁ Available XFEL energy: 250 ~ 1200 eV

⦁ Repetition rate: 2 Hz, 10 Hz, 30 Hz, 60 Hz  

⦁ Pulse duration (FWHM): < 50 fs

⦁ Bandwidth: < 0.4 % (pink)

⦁ Photon Flux: <1.0 × 10¹¹ phs/pulse @ 900 eV

⦁ XES spectrometer

Plane VLS grating type (200 - 1200 eV)

Resolving power: ~ 1500 @ 900 eV

 

□ User Information and Obligations

- All visiting users must register for the PAL system and attend a radiation safety course.

- All applicants are required to contact the PAL-XFEL staff in advance to discuss the experimental details and submit a beamtime application.

- The beamtime proposal must be submitted by the principal investigator (PI) of the research team. Students are ineligible.

- In case of change (or addition) of the samples or experimental setup specified in the proposal, users must obtain the agreement of PAL-XFEL and KOSUA (Korea Synchrotron User Association) prior to the beamtime. PAL-XFEL will provide help for implementing such change/addition but is not responsible for the plan that is not in the original beamtime proposal.

- For all kinds of beamtime proposals, an End of Run Report should be submitted to the user office of PAL within one year after finishing the experiment.

- Proposals are required to be written in English.

- PAL charges users in accordance with the Government policy. For non-proprietary research, the fee is KRW 250,000 per shift (12 hrs). For proprietary research, the fee is KRW 50,000,000 per shift.

2023-1st R and D beamtime - Call for Proposal.docx (32.72KB)