1. Gamma Beam System at ELI–NP The ELI–NP Team* ELI–NP, IFIN–HH, Bucharest–Magurele, Romania * calin.ur@eli-np.ro The ELI–NP Gamma Beam System (GBS) will produce a very intense and brilliant gamma–ray beam with energy tunable in the range E γ = 0.2–19.5MeV, obtained from the incoherent Inverse Compton Scattering (ICS) of direct laser light off a very brilliant and intense relativistic electron beam (E e ≤ 0.72 GeV). The experiments planed to be performed with the gamma–ray system require a high–quality gamma–ray beam: bandwidth ≤ 5x10 −3, energy up to 19.5 MeV to access all GDR, total flux higher than 10 11 photons/s at 100%BW, peak brilliance higher than 10 21 photons/mm 2 /mrad 2 /s/(0.1% BW). High quality lasers and a high perfomance electron radio–frequency linear accelerator are combined to build a state–of–the–art device able to deliver gamma beams with unique features in the world. Gamma Beam Delivery and Diagnostics The ELIADE –ray array Gamma Beam Parameters Integrated Control System The control system of the ELI-NP project is a large-scale distributed control system based on EPICS framework. All the Input / Output Controllers (IOC) and the Operator Interfaces (OPI) are connected by an Ethernet network via the EPICS Channel Access (CA) protocol. The control system of the ELI-NP project is a large-scale distributed control system based on EPICS framework. All the Input / Output Controllers (IOC) and the Operator Interfaces (OPI) are connected by an Ethernet network via the EPICS Channel Access (CA) protocol.  L ≂ 7 o,  = 0 o Inverse Compton Scattering ELIADE stands for ELI–NP Array of DEtectors. It will comprise 8 segmented CLOVER detectors with anti–Compton shields and 4 LaBr3 scintillator detectors. It will be used for Nuclear Resonance Florescence Experiments. Main features of ELIADE: Detectors placed on two rings (90 o and 135 o ) Ring at 90 o can be turned by up to 180 o Position accuracy of the detectors is better than 1 mm Target alignment is better than 0.1 mm Main features of ELIADE: Detectors placed on two rings (90 o and 135 o ) Ring at 90 o can be turned by up to 180 o Position accuracy of the detectors is better than 1 mm Target alignment is better than 0.1 mm General Layout of the Gamma Beam System The control system includes the following subsystems: Diagnostic system Radio Frequency (RF) system Timing system Vacuum system Magnet system Laser synchronization system. The control system includes the following subsystems: Diagnostic system Radio Frequency (RF) system Timing system Vacuum system Magnet system Laser synchronization system. Complexity highlights: over 190 complex subsystems are connected to the Control System synchronisation between systems <0.5ps Complexity highlights: over 190 complex subsystems are connected to the Control System synchronisation between systems <0.5ps ELIADE is just one of the ten experiments under construction at the GBS of ELI-NP. Gamma Beam Delivery and Diagnostics are developed in synergy with EuroGammaS. Attenuator for energy and bandwidth measurements challenges: precise absorber blocks (10 μm) high vacuum radiation hardness Attenuator for energy and bandwidth measurements challenges: precise absorber blocks (10 μm) high vacuum radiation hardness Fission chamber for flux measurements characteristics: very precise machining (μm) thin layers of radioactive materials Fission chamber for flux measurements characteristics: very precise machining (μm) thin layers of radioactive materials Beam Time Structure 15 cm 2.5 m γ-beam

2. Gamma Beam System at ELI–NP The ELI–NP Team* ELI–NP, IFIN–HH, Bucharest–Magurele, Romania * calin.ur@eli-np.ro The ELI–NP Gamma Beam System (GBS) will produce a very intense and brilliant gamma–ray beam with energy tunable in the range E γ = 0.2–19.5MeV, obtained from the incoherent Inverse Compton Scattering (ICS) of direct laser light off a very brilliant and intense relativistic electron beam (E e ≤ 0.72 GeV). The experiments planed to be performed with the gamma–ray system require a high–quality gamma–ray beam: bandwidth ≤ 5x10 −3, energy up to 19.5 MeV to access all GDR, total flux higher than 10 11 photons/s at 100%BW, peak brilliance higher than 10 21 photons/mm 2 /mrad 2 /s/(0.1% BW). High quality lasers and a high perfomance electron radio–frequency linear accelerator are combined to build a state–of–the–art device able to deliver gamma beams with unique features in the world. Gamma Beam Delivery and Diagnostics The ELIADE –ray array Gamma Beam Parameters Integrated Control System The control system of the ELI-NP project is a large-scale distributed control system based on EPICS framework. All the Input / Output Controllers (IOC) and the Operator Interfaces (OPI) are connected by an Ethernet network via the EPICS Channel Access (CA) protocol. The control system of the ELI-NP project is a large-scale distributed control system based on EPICS framework. All the Input / Output Controllers (IOC) and the Operator Interfaces (OPI) are connected by an Ethernet network via the EPICS Channel Access (CA) protocol.  L ≂ 7 o,  = 0 o Inverse Compton Scattering ELIADE stands for ELI–NP Array of DEtectors. It will comprise 8 segmented CLOVER detectors with anti–Compton shields and 4 LaBr3 scintillator detectors. It will be used for Nuclear Resonance Florescence Experiments. Main features of ELIADE: Detectors placed on two rings (90 o and 135 o ) Ring at 90 o can be turned by up to 180 o Position accuracy of the detectors is better than 1 mm Target alignment is better than 0.1 mm Main features of ELIADE: Detectors placed on two rings (90 o and 135 o ) Ring at 90 o can be turned by up to 180 o Position accuracy of the detectors is better than 1 mm Target alignment is better than 0.1 mm General Layout of the Gamma Beam System The control system includes the following subsystems: Diagnostic system Radio Frequency (RF) system Timing system Vacuum system Magnet system Laser synchronization system. The control system includes the following subsystems: Diagnostic system Radio Frequency (RF) system Timing system Vacuum system Magnet system Laser synchronization system. Complexity highlights: over 190 complex subsystems are connected to the Control System synchronisation between systems <0.5ps Complexity highlights: over 190 complex subsystems are connected to the Control System synchronisation between systems <0.5ps ELIADE is just one of the ten experiments under construction at the GBS of ELI-NP. Gamma Beam Delivery and Diagnostics are developed in synergy with EuroGammaS. Attenuator for energy and bandwidth measurements challenges: precise absorber blocks (10 μm) high vacuum radiation hardness Attenuator for energy and bandwidth measurements challenges: precise absorber blocks (10 μm) high vacuum radiation hardness Fission chamber for flux measurements characteristics: very precise machining (μm) thin layers of radioactive materials Fission chamber for flux measurements characteristics: very precise machining (μm) thin layers of radioactive materials Beam Time Structure 15 cm 2.5 m γ-beam