BL09U

Experimental Techniques

• HAXPES (Hard X-ray Photoelectron Spectroscopy)
• MX-ES (Macromolecular Crystallography End Station)

Overview

This beamline utilizes monochromatic X-rays obtained by a double-crystal monochromator with an undulator as the light source. It covers the tender to hard X-ray energy range; however, the energy is fixed at 6 keV for HAXPES measurements.

Beam Characteristics

• Energy 5～15 keV
• Flux 3.7x10¹²～7x10¹³ cps (Calculated value, depends on energy and experimental conditions)
  * Al filters for adjusting light intensity are installed inside experimental hutch 3. (Users can freely combine and select from 50 μm, 100 μm, and 150 μm thicknesses.)
  
• Beam size • Value obtained by measurement with a Au 30 μmΦ wire.
  TOA＝0° < 12.5 μm(H) x 3 μm(V)
  TOA＝88° < 360 μm(H) x 3 μm(V)

Hutch size

Approx. 9.5 m (along the beam axis) x 4.5 m (width) x 4 m (height)

Light Source and Optics

This beamline utilizes a 166-pole, 22 mm period in-vacuum undulator as its light source, and a monochromatic X-ray beam is available after passing through a liquid nitrogen-cooled Si(111) double-crystal monochromator. A double-mirror system for harmonic rejection is installed in the experimental hutch. Downstream, a channel-cut crystal and a Wolter mirror are installed.

Experimental Station

Experimental Equipment: [Hard X-ray Photoemission Spectroscopy (HAXPES) system]

Detector: [Scienta Omicron electron analyzer]

About Samples

• Sample size: Max. 16 mm (height) x 14 mm (width) (thickness: 2.5 mm or less)
• *If the sample thickness is 2.5 mm or more, a different sample transfer method will be required. Please consult with your assigned concierge or the beamline staff before submitting your reservation request.
• Sample carrier size: 16 mm (height) x 14 mm (width)
• Example of sample mounting (Si substrate): 7 mm (height) x 7 mm (width) x 0.65 mm (thickness)

Samples are fixed using carbon tape.
Note: Measurements may not be successful for non-conductive samples. Please consider applying a conductive coating (e.g., metal deposition) to the sample surface to ensure conductivity.

Note: By cutting the sample size to approximately 4 mm (height) x 10 mm (width), it is possible to mount three samples on one sample carrier.
Note: The manipulator in the main chamber can hold five sample carriers.

Regarding Charge-up Mitigation

The sufficient coating thickness for charge-up mitigation using carbon coating was investigated. A carbon coating thickness of around 10 nm is recommended.

Regarding sample prepared under inert atmosphere

Sample transfer without exposure to the atmosphere is possible using a transfer vessel. Up to five sample carriers prepared as described above can be loaded simultaneously. (Sample thickness: 2.5 mm or less)

Regarding sample carriers

Due to the limited number of sample carriers, we do not offer pre-rental. If you require sample carriers for pre-sample preparation, it will be necessary for each user to have them manufactured. The sample carrier drawing is as follows (Click to display as a PDF).

Sample carrier (plate)

Sample carrier (base)

Note: M2-8 countersunk screws are required to fix the above carrier (4 screws per carrier).

Layout