RF:RF-SSAmpTower

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Introduction

SSAmpTower is a solid-state high-power RF amplifier that drives Booster and Storage Ring RF resonant cavities of Sirius Light Source.

Booster SSA

Booster SSAmpTower is the RF transmitter for the Booster cavity. This tower provides 45kW RF Output power at 500MHz in nominal operation with approximately 54dB gain and can be operated in CW (Continuous Wave) or pulsed mode.

General description

The transmitter has three amplification stages where the last stage combines 96 amplifier modules that provide high output power in a coaxial interface (EIA 6 1/8). Each amplifier module contains a BLF578 LDMOS FET RF transistor operating in push-pull mode supplied with a 48V drain polarization from a DC-to-DC converter. In addition, a circulator is placed in each module output to protect the transistor and avoid damage from the reflected power. To sustain the stable operation, it includes a cooling system with water-cooled heatsinks, performance monitoring, and equipment protection through temperature, current consumption, and RF power detector sensors. The simplified diagram with the main components and ports is shown in Fig. 1.

Figure 1: Booster SSA Tower block diagram.

Storage Ring SSA

Storage Ring SSAmpTower is the RF transmitter for the Storage Ring cavities. Each tower provides 60kW RF Output power at 500MHz in nominal operation with approximately 54dB gain and can be operated in CW (Continuous Wave) or pulsed mode. The final configuration will combine four of these towers to drive one superconducting cavity.

General description

The transmitter has three amplification stages where the last stage combines 128 amplifier modules that provide high output power in a coaxial interface (EIA 6 1/8). Each amplifier module contains a BLF578 LDMOS FET RF transistor operating in push-pull mode supplied with a 48V drain polarization from an AC-to-DC converter. In addition, a circulator is placed in each module output to protect the transistor and avoid damage from the reflected power. To sustain the stable operation, it includes a cooling system with water-cooled heatsinks, performance monitoring, and equipment protection through temperature, current consumption, and RF power detector sensors. The simplified diagram with the main components and ports is shown in Fig. 1.

Figure 2: Storage Ring SSA Tower block diagram.

System A

System B