1. 1 System for Radiographic Control for security SRC “Sibscan” S.Baru Budker Institute of Nuclear Physics, Novosibirsk, Russia

2. 2 The device is designed for security personal inspection for the purpose of detection of dangerous items and weapons hidden on body or in clothes. Unlike inspecting for metal items, radiographic inspection is the only way to inspect for plastic explosive materials and weapons. These devices can be used at airports, customs, prisons, embassies, nuclear power centers, banks etc.

3. 3 Such systems must meet the following requirements:

4. 4 Schematic sketch of a two-coordinate Schematic sketch of a method: scanning method: 1 – X-ray tube; 1 – collimator; 2 – Two-coordinate detector 2 – linear detector

5. 5 Additional requirements:  The system shouldn’t have the visible moving parts.  The system operation should be noiseless.  The system should have only the minimum of distortion to make searching of hidden things easier.  The system components should be very stable against irradiation because its productivity can be very high (  100 persons per hour without any interruption).  Dynamic range should be very large (>400) because we will search the hidden objects inside the body and at edges of clothes.

6. 6 view from above side view Schematic sketch of SRC Such system can be created only applying scanning method to obtain an image. The basic elements of the system are: irradiator with X-ray tube, collimator and X-ray detector. The slit collimator cuts flat fan- shaped X-ray beam, which is recorded by detector after passing through the inspected person. During inspection the tube, the collimator and the detector move vertically. Detector data of irradiation distribution along one image “line” are stored to memory every several ms. On scanning completion the whole picture is transferred to computer and after quick processing image appears on display.

7. 7 First sample of SRC at the time of testing on the manufacturing plant

8. 8 Basic SRC parameters:

9. 9

10. 10 There are several systems with the same purpose: Conpass (Belarus), Scannex (South African Republic), Secure 1000, Secure 2000 (USA).

11. 11 The international inspection. It is performed by Norman Shanks (on the left) - the official European expert in the field of aviation security.

12. 12 Final of inspection. Photo for memory.

13. 13 SRC “Sibscan” on the Domodedovo airport (Moscow) The operator’s place

14. 14 These pictures are made with System of Radiography Control (SRC) “Sibscan”. The hidden plastic knife and a dummy plastic gun (made of fiberglass 4 mm thick) are clearly seen. The two pictures also show a piece of soap that imitates an explosive bar. Radiation dose is 1mkSv, which is equivalent to 10 minutes of flight background dose.