A Review of Accelerator Instrumentation

Beam impedance minimization for accelerator beamline insertion devices

“…coupling impedance, [2][3][4][5]12 and it is one of the primary sources of the impedance. A careful design of the vessel can reduce the overall impedance of the detector, increasing the life-time and the quality of the beam.…”

“…We note that the "exaggerated" modifications shown in Fig. 3(a) for M1 and M2 cavities are for illustration purpose only to demonstrate "visible" shifts and application of the expression (5). More realistic cavities can be manufactured by making small recesses affecting accurately the positions of the eigenmodes as desired taking into account good understanding of the charge particle beam properties.…”

“…State-of-the art beam detectors and monitors are indispensable for high energy and nuclear physics research, development of the new accelerators, monitoring charged beam parameters at light sources, and industrial and healthcare applications. [1][2][3][4][5][6][7][8][9][10] The number of the detectors used is growing, and they are becoming more sophisticated and complex. Recent and future facilities will have even more stringent requirements on beam stability, bunch lengths, transverse dimensions, and beam powers, meaning that more accurate and less invasive detectors will be required.…”

“…12 Modern accelerator facilities have impedance "budgets," which place strict limits on the beam impedance where each piece of experimental equipment can contribute. [2][3][4][5] The unwanted impedances can sometimes be mitigated during the design phase by relatively minor changes. Nevertheless, the impedance minimization is a challenge as it is a multiparametric problem, which often requires significant computational resources.…”