| Primary Contact: Name | Kim Yeon-Gil |
| Secondary Contact: Name | Kim Jin-Hong |
| Owner/Operator | Pohang Accelerator Laboratory |
| Status | Operational |
| Status Details | Beamlline 4A has been decomissioned. As of the begining of 2012 work done on 4A is being done at 5C. |
| Experiments | MAD |
| Source Type | INSERTION DEVICE |
| Source Details | In-vacuum Undulator 20 (IVU 20), 1.4 m |
| Spot Size (mm): Height | 300 |
| Spot Size (mm): Width | 80 |
| Monochromator | Double crystal |
| Crystal Type | Si(111) |
| Mirrors | Vertical focusing toroidal, rhodium coated |
| Flux(PHOTONS/SEC) | 7 x 10^11 |
| Flux Details | |
| Wavelength Range (Å) | 1.907 - 0.729 |
| Energy Range (keV) | 6.5 - 17 |
| Goniometer | Crystal Logic, mini-kappa |
| Detector: Type | CCD |
| Detector: Model | ADSC Quantum 315r |
| Detector: Activated for Service | 2008-08-01 |
| Detector: Removed from Service | |
| Cryo Capability | Oxford Cryostream - 600 series |
| Lab Facilities | COLD ROOM |