{
  "annotation_id": "fe73d326-e5cc-4617-9493-5cf46b4707f8",
  "date_created": "2026-03-02T18:00:49.649000Z",
  "date_modified": "2026-03-02T18:00:49.649000Z",
  "file_hash": "00072e296c8369a6a38e919f5feb36260e5abfaef9fda092a54359a91b1b7aeb",
  "private": false,
  "record": {
    "abstract": "A new amplifier-shaper-discriminator (ASD) chip was designed and manufactured\nfor the Micro Pixel Chamber ($\\mu$-PIC). The design of this ASD IC is based on\nthe ASD IC (TGC-ASD) for the Thin Gap Chamber in the LHC Atlas Experiment. The\ndecay time constant of the preamplifier is 5-times longer than that of the\nTGC-ASD, and some other modifications have been made in order to improve the\nsignal-to-noise ratio of the $\\mu$-PIC. The ASD IC uses SONY Analog Master\nSlice bipolar technology. The IC contains 4 channels in a QFP48 package. The\ndecay time constant of the preamplifier is 80 ns and its gain is approximately\n0.8 V/pC. The output from the preamplifier is received by a shaper\n(main-amplifier) with a gain of 7. A baseline restoration circuit is\nincorporated in the main-amplifier, and the current used for the baseline\nrestoration is 5-times smaller than that of the TGC-ASD. The threshold voltage\nfor the discriminator section is common to the 4 channels and their digital\noutput level is LVDS-compatible. The ASD IC also has an analog output of the\npreamplifier. The equivalent noise charge at the input capacitance of 50 pF is\naround 2000 electrons. The power dissipation with LVDS outputs (100 $\\Omega$\nload) is 57 mW/ch. Using this ASD, the analog output voltage from the signal of\nthe $\\mu$-PIC is about 2-times higher than the case of using the TGC-ASD.As a\nconsequence, the MIPs tracking performance of the Time Projection Chamber (TPC)\nwith the $\\mu$-PIC was improved.The performance of the ASD IC and an improved\ntracking performance of the TPC are reported.",
    "arxiv_id": "physics/0403065",
    "authors": [
      "R. Orito",
      "O. Sasaki",
      "H. Kubo",
      "K. Miuchi",
      "T. Nagayoshi",
      "Y. Okada",
      "A. Takada",
      "A. Takeda",
      "T. Tanimori",
      "M. Ueno"
    ],
    "categories": [
      "physics.ins-det"
    ],
    "doi": "10.1109/TNS.2004.832673",
    "journal_ref": "IEEE Trans.Nucl.Sci. 51 (2004) 1337-1342",
    "title": "Development of an ASD IC for the Micro Pixel Chamber",
    "url": "https://arxiv.org/abs/physics/0403065"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e51b4e37-a42c-4d2a-92ea-e9174d9af9c5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}