01 / Story

The scene

A fast-neutron therapy machine does not resemble a power-system test rig. Nevertheless, both demand highly controlled high-voltage technology. Researchers in Karlsruhe developed a compact 14 MeV neutron generator system named KARIN; HAEFELY acted as a licensee making the clinical equipment. A Karlsruhe report records installation of the clinical prototype in Heidelberg in 1976, before routine clinical use that began the following year.

02 / Story

The engineering challenge

The neutron tube sat in a heavily shielded treatment head on a rotating gantry, so the radiation could be directed toward the patient from different angles. This was an experimental chapter in radiation oncology, accompanied by demanding questions about dosimetry, shielding, clinical outcomes and the lifetime of a consumable neutron tube. Later records identify related systems in Zurich and Münster.

03 / Story

Why it matters

One of the most revealing details comes from the end of the story: a clinical report describing Münster’s program linked its cessation to the availability of replacement neutron tubes. It shows how a medically ambitious machine can depend on a very practical supply chain. Nothing in this evidence identifies HAEFELY as a manufacturer of diagnostic X-ray scanners or MRI machines. What it does document is a rare intersection of high-voltage equipment manufacturing and the history of cancer treatment.

Evidence / What the documents actually establish

Sources, scope and limits.

Karlsruhe annual reports and a clinical paper; this is not evidence of diagnostic X-ray or MRI manufacture.

  1. KfK 2379 1976 KARIN Heidelberg clinical original pp89-91S-E3-001 · contemporary_reporting · original_pdf_text_and_page_image_verified
  2. KfK 2686 1978 KARIN Heidelberg Zurich original p119S-E3-002 · contemporary_reporting · original_pdf_text_and_page_image_verified
  3. 1996 Prott et al clinical decade Haefely neutron therapy MunsterS-E3-006 · contemporary_reporting · original_journal_abstract_and_intro
  4. Schmidt 1984 conference / 1985 ZfK-562 KARIN radiotherapy Zurich 1980 and Münster 1984S-E4-001 · contemporary_reporting · original_pdf_text_read_image_unavailable

Visual quotations document individual historical points with named sources and creators; they are not a general image-library licence. Equipment claims are intentionally narrower than the surrounding institution’s activities.