Test of a small prototype of the KLOE drift chamber in magnetic field

A 32 channels charge integrating ADC based on digital signal integration

“…The asymptotic values of the energy resolution for 60 truncated samples are about 6% for pions and 7% for electrons. These results are in agreement with the measurements obtained using the prototypes of the KLOE drift chamber [4,5].…”

“…Each mezzanine card processes four channels in parallel giving a total amount of 32 channels per board (2). 4 Figure 2 shows the simplified block diagram of the VME 9U main board and mezzanine cards. The board processes 32 drift chamber front end signals.…”

Technical design report for the $\overline{P}$ ANDA (AntiProton Annihilations at Darmstadt) Straw Tube Tracker

“…The simulations have been performed using the GARFIELD program and the build-in MAGBOLTZ package [37]. The good agreement of these simulation data with the experimental results obtained by the KLOE drift chamber prototype [38], as shown in fig. 19, can be interpreted as a proof of the validity of the simulations of the straw tube parameters.…”

Test of a small prototype of the COMET cylindrical drift chamber

“…The drift velocity in He−iC 4 H 10 (90/10) gas mixture is unsaturated near 1000 V/cm/atm. Figure 8 also shows other results of calculations [16] and experimental measurements [17,18,19] together with Garfield++ simulation. In the Garfield++ simulation, we considered an experimental uncertainty of gas mixture ratio as ranging from 89.6 : 10.4 to 90.4 : 9.6, and an uncertainty of water vapor con- tamination as ranging from 0 to 0.12% 6 .…”

“…6 The experimental uncertainty of the gas mixture ratio is given by specifications of mass flow controllers; and the uncertainty of the water vapor contamination is estimated by some tests under different circumstances after the beam test. with Garfield++ simulation, calculations of Sharma-Sauli [16], and experiments of P. Bernardini [17], C. Grab [18], and a KLOE-CDC prototype [19]. For the band of Garfield++ simulation, the lower boundary corresponds to the gas mixture ratio between He and iC 4 H 10 at 90.4 : 9.6, and the upper boundary corresponds to the gas mixture ratio at 89.6 : 10.4 with 0.12% water vapor.…”