Radiation length imaging with high-resolution telescopes

Stolzenberg, U.; Frey, A.; Schwenker, B.; Wieduwilt, P.; Mariñas, C.; Lütticke, F.

doi:10.1016/j.nima.2016.06.086

Cited by 6 publications

(16 citation statements)

References 8 publications

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“…Combining the EUDET-type telescopes as high-precision tracking devices and the moderate test beam momenta of the DESY II Test Beam Facility, a high spatial resolution for material budget imaging measuring the scattering angle of each particle can be achieved. This methodology has been used by different groups and experiments to gauge the material budget of detector prototypes or other objects, for example [72,102,103].…”

Section: Materials Budget Imaging: Using Scattering Angles To Gauge Mamentioning

confidence: 99%

EUDAQ—a data acquisition software framework for common beam telescopes

et al. 2020

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The development of EUDAQ started as part of the EU-funded Joint Research Activity of the EUDET project "Test Beam Infrastructure" [3,4] in 2005. The goal of the project was the development of a high-precision pixel beam telescope for investigations of the tracking performance of sensor devices. To make this beam telescope a versatile tool for a broad user base and a wide variety of devices, an easy integration strategy for devices under test (DUT) and its DAQ was a priority from the beginning of the project [5]. The interface that was considered to be the most flexible for the user consisted of two separate layers: on the hardware level, the different DAQ systems were to be synchronised using a simple trigger-busy communication protocol; on the software level, the full integration of the DUT into EUDAQ was foreseen as the preferred approach, yet was kept optional.This approach determined the core architecture of EUDAQ [6] which remains today: centralised but distributed core components that communicate with so-called Producers via a custom TCP/IPbased protocol. In this scheme, the latter are responsible for implementing an interface to the individual hardware components, controlling the devices' states and feeding the data into the central data collection unit. Both the beam telescope detector planes and the DUT use the same interface, thus making the framework flexible and independent of any specific hardware. The framework architecture is described in more detail in Section 2.Historically, the most prominent application of EUDAQ is the DAQ of the EUDET-type pixel beam telescopes [7]. They are based on Mimosa26 sensors [8] as telescope planes and a custom-designed trigger logic unit (TLU), the EUDET TLU [9]. Today, the EUDET-type beam telescopes are accessible as common infrastructure at test beam facilities all over the world. This broad availability of beam telescopes combined with the ease-of-use, extensive documentation and user-focus of EUDAQ outlined in Section 3 has led to a large number of successful EUDAQ-based test beam campaigns in the last decade: in Section 4, eleven applications from a wide range of communities are described in more detail.Since the early days of mostly user-driven development, EUDAQ has been moved to a collaborative development model with several active contributors. New features as well as many behind-the-scenes changes such as continuous integration methods paved the road towards the second major version of EUDAQ as briefly outlined in Section 5.

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Section: Materials Budget Imaging: Using Scattering Angles To Gauge Mamentioning

confidence: 99%

EUDAQ—a data acquisition software framework for common beam telescopes

et al. 2020

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“…The (local) radiation length X/X 0 is estimated by fitting the distribution of deflection angles to the Highland formula which is convoluted with a Gaussian density for the angular telescope resolution. More details on radiation length imaging can be found in [7].…”

Section: Materials Budget and Radiation Length Imagingmentioning

confidence: 99%

Development and construction of the Belle II DEPFET pixel detector

Schwenker¹

2017

Proceedings of the 25th International Workshop on Vertex Detectors — PoS(Vertex 2016)

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The construction of the new accelerator at the Japanese Flavour Factory (KEKB) has been finalized and the commissioning of its detector (Belle II) is planned by early 2017. This new e + e − machine ("SuperKEKB") will deliver an instantaneous luminosity of 8 × 10 35 cm −2 s −1 , which is 40 times higher than the world record set by KEKB. In order to be able to fully exploit the increased number of events and provide high precision measurements of the decay vertex of the B meson systems in such a harsh environment, the Belle II detector will include a new silicon vertex detector, based on the DEPFET technology. The new pixel detector, located close to the interaction point, consists of two layers of active pixel sensors. The DEPFET technology combines the detection and the in-pixel amplification by the integration, on every pixel, of a field effect transistor into a fully depleted silicon bulk. In Belle II, DEPFET sensors thinned down to 75 µm with low power consumption and low intrinsic noise will be used. In this paper, an overview of the latest results and the construction status are presented. Properties of small prototype matrices operated with close to final readout ASIC electronics have been characterized. In particular results from a combined test beam with full-size matrices are described.

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“…The radiation length measurement method is described in [2]. The basic idea is to reconstruct multiple scattering angles from charged particle tracks on a central measurement plane.…”

Section: Radiation Length Imagingmentioning

confidence: 99%

Radiation length imaging with high resolution telescopes

Stolzenberg¹,

Schwenker²,

Frey³

et al. 2017

Proceedings of 38th International Conference on High Energy Physics — PoS(ICHEP2016)

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The construction of low mass vertex detectors with a high level of system integration is of great interest for next generation collider experiments. Radiation length images with a sufficient spatial resolution can be used to measure and disentangle complex radiation length (X/X 0 ) profiles and contribute to the understanding of vertex detector systems. Beam test experiments with multi GeV particle beams and high resolution tracking telescopes provide an opportunity to obtain precise 2D images of the radiation length of thin planar objects. At the heart of the X/X 0 imaging is a spatially resolved measurement of the scattering angles of particles traversing the object under study. In order to demonstrate the capabilities of X/X 0 imaging, a beam test experiment has been conducted. The device under test was a mechanical prototype half-ladder of the Belle II pixel detector (PXD). The measured X/X 0 image was overlaid with a Geant4 simulation of a PXD half-ladder and excellent agreement was found. As shown here, radiation length imaging of detectors can serve as a method to validate geometry models of complex vertex detectors.

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Radiation length imaging with high-resolution telescopes

Cited by 6 publications

References 8 publications

EUDAQ—a data acquisition software framework for common beam telescopes

EUDAQ—a data acquisition software framework for common beam telescopes

Development and construction of the Belle II DEPFET pixel detector

Radiation length imaging with high resolution telescopes

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