Lycoris -- a large-area, high resolution beam telescope

A high-resolution beam telescope is one of the most important and demanding infrastructure components at any test beam facility. Its main purpose is to provide reference particle tracks from the incoming test beam particles to the test beam users, which allows measurement of the performance of the device-under-test (DUT). \LYCORIS, a six-plane compact beam telescope with an active area of $\sim$10$\times$\SI{10}{\square\centi\metre} (extensible to 10$\times$\SI{20}{\square\centi\metre}) was installed at the \DIITBF in 2019, to provide a precise momentum measurement in a \SI{1}{\tesla} solenoid magnet or to provide tracking over a large area. The overall design of \LYCORIS will be described as well as the performance of the chosen silicon sensor. The \SI{25}{\micro\metre} pitch micro-strip sensor used for \LYCORIS was originally designed for the \SID detector concept for the International Linear Collider. It adopts a second metallization layer to route signals from strips to the bump-bonded \KPIX ASIC and uses a wire-bonded flex cable for the connection to the DAQ and the power supply system. This arrangement eliminates the need for a dedicated hybrid PCB. Its performance was tested for the first time in this project. The system has been evaluated at the \DIITBF in several test-beam campaigns and has demonstrated an average single-point resolution of \SI{7.07}{\micro\meter}.Comment: 43 pages, 37 figure

Public Information and Performance: The Role of Spatial Dependence in the Worldwide Governance Indicators among African Countries

The Worldwide Governance Indicators (WGI) provide transparent and comparable country statistics for different dimensions of governance linked to (under)development. Yet, does the public availability of governance data actually enhance performance? If investors, donor agencies, and citizens are made aware of relative governance performance, competition for inward investment, such as FDI and ODA, and domestic legitimacy become plausible mechanisms for diffusion of good governance. We test whether such mechanisms operate using the WGI for Africa, and find evidence for spatial diffusion of democracy, rule of law, and corruption control. There is no evidence for diffusion of regulatory quality and government effectiveness

First performance results of the Lycoris large area strip beam telescope

A Silicon beam telescope is one of the most important and equally demanding test beam equipment, that provides particle tracking to test beam users. LYCORIS, a six-plane compact beam telescope with an active area of 10×10 cm2 (extensible 10×20 cm2 ) has been installed at the DESY II Test Beam Facility in March 2019, to provide momentum measurement in a 1T solenoid magnet or to provide tracking over a large area. It is designed to provide a high spacial resolution of ∼7.2μm along the magnet bending direction and to cover at least 90% of the beam particles between 1GeV and 6GeV momentum. The ∼25 μm pitch micro-strip sensor used for LYCORIS was originally designed for the SiD detector conceptual at the International Linear Collider, which adopts a second metallization layer to route signals from sensor to bump-bonded ASIC then to outside through a wire-bonded flex cable. This arrangement eliminates the need for a complex hybrid design thus called hybrid-less, and its functioning was first-time tested in this project. A two- plane prototype was firstly built and tested in February 2019 at DESY II Test Beam Facility. As a result, a good signal-to- noise ratio of 10 − 15 and a clear spatial correlation between the two sensor planes demonstrate the prototype functionality. A commissioning test was then carried out in April/May 2019 with the full six planes in the solenoid, and a pixel EUDET telescope was used to provide reference tracking. This presentation will focus on the unique design aspects of the LYCORIS system, and the test beam commissioning results

Development of a large active area beam telescope based on the SiD microstrip sensorI

A beam telescope as one of the most important and often requested test beam equipment provides particle tracking to test beamusers. At the DESY II test beam facility, a new beam telescope called Lycoris based on a microstrip sensor has been designed toaddress the user demands for momentum measurement in a 1 T solenoid magnet or large area tracking with limited space (3:5 cmbetween the potential user device and the magnet inner wall). Lycoris is designed to provide a high-precision resolution of at least10 µm along the bending direction, and a large active area of 1010 cm2 to cover at least 90% of the beam particles at energies of1-6 GeV. The microstrip sensor was originally designed for the Silicon Detector (SiD) at the International Linear Collider (ILC),which adopted a hybrid-less design, i.e. a second metallization layer is used to route signals from strips to the bump-bonded ASIC,and from the ASIC to a wire-bond pad to the outside. This hybrid-less arrangement eliminates the need for a complex hybriddesign, and its functioning is first-time tested in this project. The performance of the sensor modules was firstly tested in the labthen at the DESY II test beam facility in August/September 2018, and the results will be presented here. In addition, a summarywill be given at the end with an overview of the ongoing test beam campaign of the Lycoris prototype in February 2019