Experimental High Energy Physics Summer School For High Schools

Experimental High Energy Physics Summer School for High Schools, (Liseler \.{I}\c{c}in Deneysel Y\"{u}ksek Enerji Fizi\u{g}i Yaz Okulu - lidyef2018) was held between 9-16 September 2018 at Bo\u{g}azi\c{c}i University, Turkey, with financial support from T\"{U}B\.{I}TAK under the 4004 grant 118B491. Out of nearly 700 (11th and 12th grade) applicants, 30 had been selected from all around Turkey. Students were introduced to the fundamentals of high energy physics and performed experiments that demonstrated the techniques of this field, such as a salad-bowl electrostatic accelerator, and a cloud chamber. Here we report on the planning, implementation and the outcomes of the school that can serve as a template for similar activities in the future.Comment: 9 pages, 10 figures, TFD 34 conference proceedin

OPUCEM: A Library with Error Checking Mechanism for Computing Oblique Parameters

After a brief review of the electroweak radiative corrections to gauge-boson self-energies, otherwise known as the direct and oblique corrections, a tool for calculation of the oblique parameters is presented. This tool, named OPUCEM, brings together formulas from multiple physics models and provides an error-checking machinery to improve reliability of numerical results. It also sets a novel example for an "open-formula" concept, which is an attempt to improve the reliability and reproducibility of computations in scientific publications by encouraging the authors to open-source their numerical calculation programs. Finally, we demonstrate the use of OPUCEM in two detailed case studies related to the fourth Standard Model family. The first is a generic fourth family study to find relations between the parameters compatible with the EW precision data and the second is the particular study of the Flavor Democracy predictions for both Dirac and Majorana-type neutrinos.Comment: 10 pages, 19 figures, section 3 and 4 reviewed, results unchanged, typo correction

Oblique Parameters and Extra Generations via OPUCEM

Recent improvements to OPUCEM, the tool for calculation of the contributions of various models to oblique parameters, are presented. OPUCEM is used to calculate the available parameter space for the four family Standard Model given the current electroweak precision data. It is shown that even with the restrictions on Higgs boson and new quark masses presented in the 2011 autumn conferences, there is still enough space to allow a fourth generation with Dirac type neutrinos. For Majorana type neutrinos, the allowed region is even larger. The electroweak precision data also favors non-zero mixing between light and fourth generations, thus effectively reducing current experimental limits. Additionally, calculations with OPUCEM show that even 5th and 6th generations are compatible with the existing electroweak precision data, with a probability comparable to or higher than the Standard Model with 3 generations.Comment: 11 pages, 21 figures, 5 tables - Version accepted by EPJ-

Commissioning of the ATLAS high-level trigger with single beam and cosmic rays

ATLAS is one of the two general-purpose detectors at the Large Hadron Collider (LHC). Using fast reconstruction algorithms, its trigger system needs to efficiently reject a huge rate of background events and still select potentially interesting ones with good efficiency. After a first processing level using custom electronics, the trigger selection is made by software running on two processor farms, designed to have a total of around two thousand multi-core machines. This system is known as the High Level Trigger (HLT). To reduce the network data traffic and the processing time to manageable levels, the HLT uses seeded, step-wise reconstruction, aiming at the earliest possible rejection of background events. The recent LHC startup and short single-beam run provided a "stress test" of the trigger. Following this period, ATLAS continued to collect cosmic-ray events for detector alignment and calibration purposes. These running periods allowed strict tests of the HLT reconstruction and selection algorithms as well as of its configuration and monitoring systems. This facilitated the commissioning of several tracking, muon-finding, and calorimetry algorithms under different running conditions. After an overview of the trigger design, this paper focuses on the experience gained in running the trigger in the fast-changing environment of the detector commissioning. It will emphasize the commissioning of the HLT algorithms, monitoring and configuration

Beam Diagnostics for Low Energy Proton Beam

An 800 MHz Radio Frequency Quadrupole (RFQ) is being designed for obtaining 2MeV protons at KAHVELab. The beam originating from the ion source has to match the RFQ via an optimised Low Energy Beam Transport (LEBT) line. LEBT line consists of two solenoids, a beam diagnostic box in between, and two steerers. The solenoids will be utilised to focus the divergent beam coming from the microwave discharge ion source to the RFQ.The steerers will be deployed to direct the beam into the RFQ. The diagnostics are aimed to measure the proton beam’s current, profile as well as the beam emittance upstream of the RFQ. The measurement box is designed and ready for production. The prototype for the Faraday cup is produced, for the scintillator screen will be home-built, and for the pepper pot plate is being manufactured. In this talk, the magnetic field measurements of the steerers, the electromagnetic simulation and the assembly of the FC and design code of the emittance measurement will be presented.This study is supported by TUBITAK Project no: 119M77

Monitoring Akkuyu nuclear reactor using antineutrino flux measurement

We present a simulation-based study for monitoring Akkuyu nuclear power plant's activity using antineutrino flux originating from the reactor core. A gadolinium-doped water Cherenkov detector was designed and optimization studies were performed using the Geant4 simulation toolkit. It was found that the bottom (or top) face of the target should be instrumented by six 10-inch-diameter photomultiplier tubes with photon detection efficiency of about 35% and the optimum Gd concentration was found to be about 0.3%-0.5%. The first study on the design of a monitoring detector facility for Akkuyu nuclear power plant is discussed in this paper